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24) Whether a truck comes to a stop by crashing into a haystack or a brickwall, the impulse is1.A) greater with the haystack.2.B) greater with the brick wall.3.C) both the same
Diff: 2Topic: Impulse Changes Momentum25) When a boxer moves into an oncoming punch, the force experienced is
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Diff: 2Topic: Impulse Changes Momentum26) When a boxer is moving away from a punch, the force experienced isreduced because
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Diff: 2Topic: Impulse Changes Momentum27) A cannon recoils while firing a cannonball. The speed of the cannon’srecoil is relatively small because the
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Topic: Impulse Changes Momentum28) A tiny gun made of a strong but very light material fires a bullet moremassive than the gun itself. For such a weapon1.A) the target would be safer than the shooter.2.B) recoil problems would be lessened.3.C) conservation of energy would not hold.4.D) conservation of momentum would not hold.5.E) both conservation of energy and momentum would not hold.Answer: A
Diff: 2Topic: Impulse Changes Momentum29) A heavy truck and a small car rolling down a hill at the same speed areforced to stop in the same amount of time. Compared with the force that stopsthe car, the force needed to stop the truck is
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Diff: 2Topic: Impulse Changes Momentum30) The force that accelerates a rocket in outer space is exerted on the rocketby the
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Diff: 2Topic: Impulse Changes Momentum31) The average braking force of a 1000-kg car moving at 10 m/s braking to astop in 5 s is
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Diff: 2Topic: Impulse Changes Momentum32) A falling 1-N apple hits the ground with a force of about1.A) 1 N.2.B) 2 N.3.C) 4 N.4.D) 10 N.5.E) need more informationAnswer: E
Diff: 3Topic: Impulse Changes Momentum33) A bungee jumper attains a speed of 30 m/s just as the bungee cord beginsto stretch. If the period of stretch is 2 s while coming to a halt, the jumper’saverage deceleration is about....
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Diff: 3Topic: Impulse Changes Momentum
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