Physics principles and problems solution manual pdf

Baseball A 0. Find the change in momentum of the ball. If the ball is caught with the mitt held in a stationary position so that the ball stops in 0. If, instead, the mitt is moving backward so that the ball takes 0. Hockey A hockey puck has a mass of 0. What is the impulse on the puck? If the collision takes 5. A nitrogen molecule with a mass of 4. What is the impulse the molecule delivers to the wall?

If there are 1. Rockets Small rockets are used to make tiny adjustments in the speeds of satellites. One such rocket has a thrust of 35 N. An animal rescue plane flying due east at If the bale of hay weighs N, what is the momentum of the bale the moment before it strikes the ground?

Give both magni- N tude and direction. First use projectile motion to find the velocity of the bale. Accident A car moving at There is a What is the impulse needed to stop the child?

What is the average force on the child? After e. Why is it advisable to use a proper vFB vDT 0 restraining seat rather than hold a child on your lap? You would not be able to protect a child on your lap in the event of a collision. Football A kg fullback, running at pFB! Both players end up with zero c. What was the change in the defensive vFB!

How fast was the defensive tackle mov- ing originally? Marble C, with mass 5. Calculate the momentum of marble D speed of It collides with a sec- after the collision. After the pDf! Sketch the situation and identify the sys- 1. Before: mC! What is the speed of marble D after the mD! Two lab carts are pushed together with a spring mechanism compressed between vCi vDi them. Upon release, the 5. What is the velocity of the 2.

Calculate the momentum of marble C Assuming that the projectile, C, is after the collision. Skateboarding Kofi, with mass Kofi jumps off and the skateboard stops dead in its tracks.

In what direction and with what velocity did he jump? Billiards A cue ball, with mass 0. A kg van runs into the back of an kg compact car at rest.

They move off together at 8. Assuming that the fric- tion with the road is negligible, calculate the initial speed of the van. Before: mK! For the eight ball, vDf! Thus, v8f! Which skater has the greater speed? Keshia, who has the smaller mass, has the greater speed. Which skater pushed harder? The forces were equal and opposite. It collides with a second plastic ball of mass 0.

After the collision, both balls continue moving in the same, original direction. The speed of the 0. What is the new velocity of the 0. A constant force of 6. The change in momentum is!

The velocity of a kg car is changed from What is the resulting change in momentum of the car? What is the magnitude of the force? Dragster An kg dragster accelerates on a race track from rest to What is the change in momentum of the dragster?

What is the average force exerted on the dragster? What exerts that force? The force is exerted by the track through friction. Level 2 Ice Hockey A 0. The puck and jacket slide off together. Find their velocity. The woman jumps off the front of the cart and lands on the ground at 7. Before: mw! Gymnastics Figure shows a gymnast performing a routine. First, she does giant swings on the high bar, holding her body straight and pivoting around her hands. Then, she lets go of the high bar and grabs her knees with her hands in the tuck position.

Finally, she straightens up and lands on her feet. She spins around the center of mass of her body, first in the tuck posi- tion and then also as she straightens out. Rank in order, from greatest to least, her moments of inertia for the three positions. Rank in order, from greatest to least, her angular velocities in the three positions. With what momentum does he reach the ground? What impulse is needed to stop the dancer?

Thus, F! As the dancer lands, his knees bend, lengthening the stopping time to 0. Compare the stopping force with his weight. Thinking Critically page Apply Concepts A kg fullback, running at 5. Just as he reaches the line, he is met head-on in midair by two kg linebackers, both moving in the direction opposite the full- back. One is moving at 2. They all become entan- gled as one mass. Before: mA! What is the velocity of the football players after the collision?

Does the fullback score a touchdown? The velocity is positive, so the football crosses the goal line for a touchdown. Analyze and Conclude A student, holding a bicycle wheel with its axis vertical, sits on a stool that can rotate without friction.

She uses her hand to get the wheel spinning. Would you expect the student and stool to turn? The student and the stool would spin slowly in the direction opposite to that of the wheel. Without friction there are no external torques. Thus, the angular momentum of the system is not changed. The angular momentum of the student and stool must be equal and opposite to the angular momentum of the spinning wheel. Analyze and Conclude Two balls during a collision are shown in Figure , which is drawn to scale.

The balls enter from the left, collide, and then bounce away. The heavier ball, at the bottom of the diagram, has a mass of 0. Using a vector diagram, determine whether momentum is conserved in this collision. Explain any difference in the momentum of the system before and after the collision. Because the masses have a ratio, a ratio of velocity changes will compensate.

How can highway barriers be designed to FT! Thus, the impulse also does not You wish to launch a satellite that will change. This means the satellite must have a increased. Using barriers that can period of exactly one day. Calculate the extend the time it takes to stop a car radius of the circular orbit this satellite will reduce the force.

Flexible, plastic must have. Hint: The Moon also circles Earth containers filled with sand often are and both the Moon and the satellite will obey used. The Moon is 3. While air bags save many lives, they also from Earth and its period is If there is no friction— opposite direction.

A cue ball travels across a pool table and does not stop. The two balls have equal masses. After the colli- What must be motion rides. How could a child change the true regarding the speed of the eight ball? He or she could stand next to it before the collision.

He or Consider a ball falling toward Earth. Why is the momentum of the ball not onboard. After time B, pages — the object is at rest. After time C, the Explain the concept of impulse using physi- object moves with a constant, negative cal ideas rather than mathematics. A force, F, exerted on an object over a time,! During a space walk, the tether connecting object to change by the quantity F!

Using a gas pistol, the astronaut manages to get back Is it possible for an object to obtain a larger to the ship. Use the language of the impulse- impulse from a smaller force than it does momentum theorem and a diagram to from a larger force? Yes, if the smaller force acts for a long When the gas pistol is fired in the oppo- enough time, it can provide a larger site direction, it provides the impulse impulse. Foul Ball You are sitting at a baseball game when a foul ball comes in your direction.

You prepare to catch it bare-handed. To catch it safely, should you move your hands toward the ball, hold them still, or move them in the same direction as the moving! You should move your hands in the same direction the ball is traveling to increase the time of the collision, thereby reducing the force.

Explain the difference in exit speeds of action in terms of the law of conservation of the two bullets, assuming that the forces momentum. Define the system and draw a exerted on the bullets by the expanding diagram as a part of your explanation. Before After The bullet is in the rifle a longer time, p p so the momentum it gains is larger. An object initially at rest experiences the impulses described by the graph in Figure The wall and Earth gain 6 8 10 11 0 some momentum in the collision.

Imagine that you command spaceship Zeldon, which is moving through interplan- Time s etary space at high speed. Two trucks that appear to be identical col- contact with the ball? One was originally at m! The trucks are stuck together and move F N at more than half the original speed of the! What can you conclude about the contents of the two trucks? Thus, the a. Find the change in momentum of the moving truck must have had a more ball. Take the direction of the pitch to be positive. Explain, in terms of impulse and momen-!

If the ball and bat are in contact for tum of the rifle works against only the 4. The recoil momentum must work! Bullets Two bullets of equal mass are shot!

One bullet, made of rub- ber, bounces off of the wood. The other! In which case does the block of Bowling A force of N acts on a 7. What is its momentum of the block and bullet after change in velocity?

The rub-! Hockey A hockey player makes a slap shot,! What is the magni-! A kg freight truck accelerates F! What change in momentum occurs? How large of a force is exerted? A hockey puck has a mass of 0. A hockey player makes a shot,! With what speed does it In a ballistics test at the police department, head toward the goal?

Officer Rios fires a 6. What is the average force that stops the bullet? Find the impulse that acted Volleyball A 0. Tina bumps at the following velocities. What average force F! Baseball A 0. Find the change in momentum of the ball. If the ball is caught with the mitt held in a stationary position so that the ball stops in 0.

If, instead, the mitt is moving backward so that the ball takes 0. Hockey A hockey puck has a mass of 0. What is the impulse on the puck? If the collision takes 5. A nitrogen molecule with a mass of 4. What is the impulse the molecule delivers to the wall? If there are 1. Rockets Small rockets are used to make tiny adjustments in the speeds of satellites.

One such rocket has a thrust of 35 N. An animal rescue plane flying due east at If the bale of hay weighs N, what is the momentum of the bale the moment before it strikes the ground? Give both magni- N tude and direction. First use projectile motion to find the velocity of the bale.

Accident A car moving at There is a What is the impulse needed to stop the child? What is the average force on the child? After e. Why is it advisable to use a proper vFB vDT 0 restraining seat rather than hold a child on your lap?

You would not be able to protect a child on your lap in the event of a collision. Football A kg fullback, running at pFB! Both players end up with zero c. What was the change in the defensive vFB! How fast was the defensive tackle mov- ing originally? Marble C, with mass 5. Calculate the momentum of marble D speed of It collides with a sec- after the collision.

After the pDf! Sketch the situation and identify the sys- 1. Before: mC! What is the speed of marble D after the mD! Two lab carts are pushed together with a spring mechanism compressed between vCi vDi them. Upon release, the 5. What is the velocity of the 2. Calculate the momentum of marble C Assuming that the projectile, C, is after the collision. Skateboarding Kofi, with mass Kofi jumps off and the skateboard stops dead in its tracks.

In what direction and with what velocity did he jump? Billiards A cue ball, with mass 0. A kg van runs into the back of an kg compact car at rest. They move off together at 8. Assuming that the fric- tion with the road is negligible, calculate the initial speed of the van. Before: mK! For the eight ball, vDf! Thus, v8f! Which skater has the greater speed? Keshia, who has the smaller mass, has the greater speed. Which skater pushed harder?

The forces were equal and opposite. It collides with a second plastic ball of mass 0. After the collision, both balls continue moving in the same, original direction. The speed of the 0. Most of the physics lessons are designed to be projected to a class and can be used by a teacher to demonstrate many physics concepts. It will not waste your time.

Just invest tiny time to retrieve this on-line declaration chapter 20 protists answer key as competently as review them wherever you are now. Don't cheat! Chapter 5: Public Opinion [].

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A Glencoe Program. Vector Diagram. Solutions Manual.