Balanced forces acting on an object cause the object to accelerate.

Gravity causes all falling objects to accelerate at a rate of 98 m/s².

Acceleration is defined as the rate of change of position.

The momentum of a 5,000-kg truck that is standing still is greater than the momentum of a 3,000-kg truck that is also at rest.

The projectile velocity is the highest velocity that will be reached by a falling object.

When an object falls, it is reacting to the force of gravity.

Jane is on a merry-go-round that is moving at a constant speed. Her velocity is also constant.

Momentum is a property of an object and cannot be transferred from that object to another object.

Objects in Earth's orbit appear to be weightless because they are in free fall.

Friction is a force that encourages motion between two surfaces that are touching each other.

The upward force on an object falling through the air is ____.

The relationship among mass, force, and acceleration is explained by ____.

A feather will fall through the air more slowly than a brick because of ____.

In the absence of air, a penny and a feather that are dropped from the same height at the same time will ____.

The acceleration due to gravity is ____.

According to Newton's second law of motion, ____.

When an object moves in a circular path, it accelerates toward the center of the circle as a result of ____.

The path of a projectile is ____.

For any object, the greater the force that's applied to it, the greater its ____ will be.

The size of the gravitational force between two objects depends on their ____.

As you get farther from the center of Earth, your weight will ____.

When a force is exerted on a box, an equal and opposite force is exerted by the box. These forces are called ____ forces.

A real car moving at 10 km/h has more momentum than a toy car moving at the same speed because the real car ____.

In the equation p = m ´ v, the p represents ____.

The statement "to every action there is an equal and opposite reaction" is ____.

The unit of momentum is ____.

When two balls collide, the momentum of the balls after the collision is explained by ____.

A 300-N force acts on a 25-kg object. The acceleration of the object is ____.

A 3,000-N force acts on a 200-kg object. The acceleration of the object is ____.

An object that is in free fall seems to be ____.

If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____.

A ball attached to a string is being swung in a clockwise circular path as shown in Figure 3-1. Assume the string breaks at point A. In which direction will the ball be traveling an instant later?

A ball attached to a string is being swung in a clockwise circular path as shown in Figure 3-1. In which direction will the acceleration on the ball be when the ball passes point A?