Pre-AP Physics Fall Semester Exam 2019

A 1000 kg truck moving at 10 m/s runs into a concrete wall. It takes 0.5 seconds for the truck to completely stop. What is the magnitude of the force exerted on the truck during the collision?

• 1000 N

• 5000 N

• 10, 000 N

• 20,000 N

A rollercoaster, travelling with an initial speed of 15 m/s, decelerated uniformly at -7.0 m/s² to a complete stop. Which of the following best approximates how far the rollercoaster travels during its deceleration?

• 1.0 m

• 2.0 m

• 16 m

• 32 m

Earth is slightly closer to the Sun in December than it is in June. The force of gravity of the Sun on Earth in December compared to June is ---

• slightly smaller

• considerable smaller

• slightly larger

• considerably larger

If the sum of all the forces acting on a moving object is zero, the object will do which of the following?

• slow down and stop

• continue moving with constant velocity

• change the direction of its motion

• accelerate uniformly

A force of 25 N East and a force of 25 N West act concurrently on a 5.0 kg cart. What is the acceleration of the cart?

• 0 m/s²

• .20 m/s² East

• 1.0 m/s² West

• 5.0 m/s² East

In order for a natural phenomenon to be studied scientifically, it must be ---

• observable

• measurable

• repeatable

• all of the above

Which process will most likely lead to a scientific acceptance of a hypothesis?

• revising the original hypothesis

• duplicating the results of the experiment

• developing the experimental procedure

• developing a theory based on the data

A boat travels 12.0 m while it reduces its velocity from 9.5 m/s to 5.5 m/s. What is the magnitude of the boat's acceleration?

• 1.2 m/s²

• -2.5 m/s²

• -3.0 m/s²

• 7.5 m/s²

Motion sensors recorded the following data about a runner during a cross-country race. During which segment of the race did the runner have the greatest speed?

• W

• X

• Y

• Z

An object with an initial velocity of 3.50 m/s moves east along a straight and level path. The object then undergoes a constant acceleration of 1.80 m/s² east for a period of 5.00 s. How far does the object move while its accelerating?

• 6.30 m

• 17.5 m

• 27.2 m

• 40.0 m