Stemscopes Exam STEMscopes Forces and Motion 2

Question 1

Which of the following correctly describes velocity?

Accepted Answer

Speed with a specified direction

Answer

Speed only, without direction

Answer

Distance traveled divided by time

Answer

The rate of change of acceleration

Question 2

A distance-time graph shows a straight horizontal line. What does this indicate about the object's motion?

Accepted Answer

The object is stationary

Answer

The object is accelerating

Answer

The object is moving at constant speed

Answer

The object is decelerating

Question 3

A skateboarder rolls down a ramp and gains speed. Which energy transformation is occurring?

Accepted Answer

Potential energy to kinetic energy

Answer

Kinetic energy to potential energy

Answer

Chemical energy to kinetic energy

Answer

Thermal energy to kinetic energy

Question 4

Which factor does NOT directly affect the gravitational force between two objects?

Accepted Answer

Color of the objects

Answer

Mass of object 1

Answer

Mass of object 2

Answer

Distance between the objects

Question 5

A ball is thrown straight up into the air. At the highest point, the ball's velocity is:

Accepted Answer

Zero

Answer

At its maximum

Answer

Equal to its initial velocity

Answer

Negative and increasing

Question 6

What does the slope of a velocity-time graph represent?

Accepted Answer

Acceleration

Answer

Distance

Answer

Speed

Answer

Force

Question 7

A 5 kg object and a 10 kg object are dropped from the same height in a vacuum. Which hits the ground first?

Accepted Answer

They hit at the same time

Answer

The 5 kg object, because it is lighter

Answer

The 10 kg object, because it is heavier

Answer

It depends on their shapes