Forces and Motion Test 1 Review # 2

A truck is traveling in a straight line at a constant speed. Which could cause it to move faster? 

• A. a change in the mass of the truck
• B. a change in the volume of the truck 
• C. a change in gravity acting on the truck 
• D. a change in the force acting on the truck 

Which best describes how forces must interact for a sailboat to change direction against water current?

• A. The force of the person steering must be greater than the force of the water current.
• B. The force of the wind must be greater than the force of the water current.
• C. The force of the wind must be equal to the force of the water current. 
• D. The force of the wind must be less than the force of the water current. 

A book is lying on the dashboard of a car, which is stopped at a red light. Which is the most likely reason for the book to slide backward as the car begins to move forward?

• A. The book has inertia.
• B. The book has momentum. 
• C. The book has acceleration.

Which will happen to an object at rest if no other forces are acting on it? 

• A. The object will stay at rest.
• B. The object will begin to move.
• C. The mass of the object will increase. 
• D. The gravity on the object will increase.

An object is traveling at a steady speed in a straight line. Which will cause the object to change directions?

• A. a change in the mass of the object
• B. a change in the shape of the object 
• C. a balanced force acting on the object
• D. an unbalanced force acting on the object

 A ball is thrown straight up in the air and comes down into the glove of a student. Which best describes this situation?

• A. The ball is unaffected by friction.
• B. Unbalanced forces act on the ball.
• C. The ball moves at a constant speed.
• D. Balanced forces keep the ball moving. 

Four balls, each with a different mass, are hit with the same amount of force. Which ball will most likely travel the farthest?

• A. ball with a mass of 500 grams
• B. ball with a mass of 700 grams
• C. ball with a mass of 900 grams
• D. ball with a mass of 1,000 grams

Which best explains how an object’s motion changes when additional force is applied? 

• A. As force increases, acceleration increases.
• B. As force increases, acceleration decreases.
• C. As force increases, the object’s mass changes.
• D. As force increases, the object’s direction changes. 

Which will happen to a object moving at a constant speed if additional force is applied to it in the same direction?

• A. It will change speed.
• B. It will increase in mass.
• C. It will decrease in mass.
• D. It will keep moving at the same speed. 

How does the mass of an object affect acceleration?

• A. The greater the mass of an object, the greater the force needed to accelerate the object.
• B. The greater the mass of an object, the smaller the force needed to accelerate the object.
• C. The smaller the mass of an object, the greater the force needed to decelerate the object.