Forces & Motion Pre-Assessment

Which of the following is used to measure speed?

• meters

• seconds

• seconds per meter

• meters per second

A bird flies 50 meters in 10 seconds. What is its speed?

• 0.2 second per meter

• 0.2 meters per second

• 5 seconds per meter

• 5 meters per second

A flat horizontal line on a distance-vs.-time motion graph shows...

• increasing speed

• decreasing speed

• no speed

• acceleration

A car travels 4 blocks in 1 minute at a constant speed. Which of the following graphs shows the car’s speed?

• 
• 
• 
• 

Which segment of the motion graph below shows the object moving the fastest?

• A–B

• B–C

• C–D

• D–E

Carts of different masses are placed on a ramp at different heights. Which combination of features will have the greatest gravitational potential energy?

• low mass and low height

• low mass and high height

• high mass and high height

• high mass and low height

A student wants to conduct an investigation to determine if there is a relationship between the speed a cart and the cart’s kinetic energy. They should

• keep all variables the same except the kinetic energy of the cart.

• keep all variables the same except the speed of the cart.

• keep all variables the same except the mass of the cart.

• do none of the above.

Which has the greater effect on the kinetic energy of a moving object, doubling its mass or doubling its speed?

• doubling the object’s mass

• doubling the object’s speed

• doubling both have equal effects

• neither

If there is no net force acting on a moving object, it will

• continue moving at the same speed.

• continue moving in the same direction.

• continue moving at the same speed and in the same direction.

• eventually slow down and stop.

What does it take to change the direction or speed of an object?

• more than one force

• an unbalanced force

• a balanced force

• no force