ICP Fall Semester Exam Study Guide

If two objects with different masses and traveling with different velocities collide, what law allows you to predict the motion of the objects after the collision?

• the law of conservation of momentum
• the law of universal gravitation
• Newton’s third law
• Newton’s second law

When an object slows down, its acceleration is

• positive.
• centripetal.
• negative.
• constant.

An object is in motion when

• the net force acting on the object is zero.
• the object changes position relative to a frame of reference.
• the object’s displacement is greater than the distance traveled.
• friction occurs.

Using lubricants on engine parts is an example of reducing

• force.
• motion.
• acceleration
• friction.

Peter runs in a constant direction on a straight road. The velocity vs. time graph of Peter's motion shows a straight line with a negative slope. What does the line tell you about Peter’s speed?

• It is decreasing.
• It is increasing.
• It is decreasing, then increasing.
• It is constant.

Which straight-line acceleration indicates an increase in speed?

• 0 m/s²
• -15 m/s²
• 4 m/s²
• All of the above

Which of the following does not indicate velocity?

• 14 ft/s SSE
• 40 mi/h toward the town square along the main street
• 80 km/h going from New York toward New Jersey
• 28 miles from Los Angeles to Catalina Island

What happens immediately after a sky diver opens her parachute?

• The sky diver’s speed greatly increases.
• The sky diver is in free fall.
• Air resistance greatly increases.
• The force of gravity greatly increases.

When a moving bowling ball hits a pin, some of the ball’s momentum

• is lost.
• is transferred to the pin.
• increases the pin's mass.
• doubles in force.

In the absence of air resistance, how would the acceleration of a 1.5 kg book and the acceleration of a 15 kg rock differ if the objects were dropped from the same height?

• The book would accelerate twice as fast as the rock.
• The rock would accelerate twice as fast as the book.
• They would not differ; they would be the same.
• The book would accelerate ten times as fast as the rock.