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Exam 4: Newtons Laws of Motion

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Question 1

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The maximum acceleration of a car while towing a second car twice its mass, compared to its acceleration with no car in tow, is

A) one fourth.
B) the same.
C) one half.
D) one third.
E) none of these

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Question 2

Multiple Choice

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The force exerted by the road on each tire of an accelerating car

A) is more than the combined force on all four tires on the road.
B) equals the combined force of all four tires on the road.
C) is less than the combined force of all four tires on the road.

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Question 3

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Compared to the mass of a certain object on Earth, the mass of the same object on the moon is

An astronaut on another planet drops a 1-kg rock from rest and finds that it falls a vertical distance of 2.5 meters in one second. On this planet, the rock has a weight of

A vehicle that weights 400 N on the surface of the Earth is traveling in outer space at a speed of 400 m/s . It can be stopped by applying a constant force of 20 N for

A rock is thrown vertically into the air. At the very top of its trajectory the net force on it is

Joe pushes Bill, who is asleep. Bill

Which has zero acceleration? An object

A piece of rope is pulled by two people in a tug-of-war. Each pulls with 400 N of force. What is the tension in the rope?

Suppose a particle is being accelerated through space by a 10-N force. Suddenly the particle encounters a second force of 10 N in the opposite direction from the first force. The particle with both forces acting on it

If less horizontal force is applied to a sliding object than is needed to maintain a constant velocity,

A ball is thrown vertically into the air. Because of air resistance, its time coming down compared to its time going up is

An object is propelled along a straight-line path in space by a force. If the mass of the object somehow becomes twice as much, its acceleration

A 1000-kg automobile enters a freeway on-ramp at 20 m/s and accelerates uniformly up to 40 m/s in a time of 10 seconds. How far does the automobile travel during that time?

The Earth pulls on the moon. Similarly the moon pulls on the Earth, evidence that

As a ball falls, the action force is the pull of the Earth's mass on the ball. The reaction force is the

A man weighing 800 N stands at rest on two bathroom scales so that his weight is distributed evenly over both scales. The reading on each scale is

An archer shoots an arrow. Consider the action force to be exerted by the bowstring against the arrow. The reaction to this force is the

Which has the greater mass?

A karate chop delivers a blow of 3000 N to a board that breaks. The force that acts on the hand during this event is