Forces and Motion Test Review

Which is one of Newton's Laws?

• For every force there is a reaction force in the opposite direction that is equal to one-half the initial force.

• The amount of force acting on an object is equal to its mass multiplied by the acceleration of the object.

• In the absence of an unbalanced force, an object in motion will stop moving.

• The total amount of energy in a closed system will remain constant.

What is the correct description of Newton's Second law?

• Force is inversely proportional to acceleration for an object of fixed mass.

• Force is inversely proportional to mass for objects moving with a constant acceleration.

• Acceleration is directly proportional to an object's mass for a constant applied force.

• Acceleration is directly proportional to the force applied for an object of fixed mass

A bicyclist in a race travels 28km in the first hour and 32km in the next 2 hours. What is the total distance?

• 60 km

• 4 km

• 63 km

• 80 km

The average speed of a car during 5 hrs is 50 miles per hour. What is the total distance?

• 10 miles

• 1 mile

• 250 miles

• 20 miles

If a car is traveling at an average speed of 70 kilometers per hour, how long does it take the car to travel 14 kilometers?

• 0.20 hour

• 2 hours

• 980 hours

• 10 hours

which graph represents an object accelerating for the entire time?

• 
• 
• 

What does it mean if the slope of a position time graph is negative

• The object is moving backward

• The object is moving forward

• The object is speeding up

• The object is slowing down

Janelle pushes a box filled with books across the floor. She then adds some books to the box. How does the motion change?

• It will move with the same speed because the same force was applied on the box in both of the cases

• It will move with the same speed because the mass of the object does not affect the force of friction between the surfaces

• It will move faster because as mass increases, the force of friction between the surfaces decreases

• It will move slower because as mass increases, the force of friction between the surfaces also increases.

If there is nothing in the path of a baseball thrown up in the sky what will happen to the ball?

• The force of gravity will act on the ball, causing it to fall back to the ground.

• Because of inertia, it will stay on its current path until an object stops it.

• It will eventually use all of its energy and fall back to the ground.

• Wind and clouds will change its direction, causing it to fall back to the ground.

What property of motion explains a sled sliding at constant speed on an icy road

• acceleration

• Momentum

• action-reaction

• displacement