Physics Unit 3 Post Test

Front

A car moves with an average speed of 45 miles/hour. How long does the car take to travel 90 miles?

Back

2 hours

Front

The graph describes the motion of an object. The object moves with _______ from A to B. It ________ from B to C. It moves with _________ from C to D.

Back

constant velocity, remains stationary, constant velocity

Front

Which segment of this graph shows a decreasing velocity?

Back

E to F

Front

What is the primary force that helps suspension bridges use cables to hold their spans up?

Back

tension force

Front

When Akira presses the gas pedal to accelerate her car at a green light, which statement is true?

Back

The net force on the car is greater than zero in the horizontal direction.

Front

Alejandro gently releases a ball at the top of a slope, but does not push the ball. The ball rolls down the slope. Which force caused the ball to move downhill?

Back

gravitational force

Front

An object has one force acting on it. It is a 33-newton force pointing downward. To create a net force of zero on the object, which force must be applied to it?

Back

a 33-newton force pointing upward

Front

Anne applies a force on a toy car and makes it move forward. What can be said about the forces acting on the toy car at the moment Anne applies the force? The forces acting on the toy car are ______________.

Back

unbalanced

Front

A carmaker has designed a car that can reach a maximum acceleration of 12 meters/second². The car’s mass is 1,515 kilograms. Assuming the same engine is used, what should the car’s mass be if the carmaker wants to reach an acceleration of 15 meters/second²?

Back

1,212 kg

Front

Blake and Sandra are having a rummage sale. Blake drags 3 boxes a distance of 10 meters each, exerting a force of 20 newtons on each box. Sandra drags 4 boxes a distance of 12 meters each, exerting a force of 15 newtons on each box. Blake takes 2 minutes to complete his work, while Sandra takes 4 minutes. Blake does _____ work than Sandra. Blake’s power is _______ than Sandra’s power.

Back

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