Physics Midterm Review 2024

Front

What is the normal force acting on an object at rest on a flat surface?

Back

The normal force is equal to the weight of the object, acting in the opposite direction. For a 40 N object, the normal force is +40 N.

Front

What happens to the acceleration of an object moving at constant speed?

Back

There is no acceleration when an object is moving at constant speed.

Front

What is the force required to maintain a rocket's constant velocity in outer space?

Back

The force required is zero, as there is no friction or opposing force in space.

Front

What is the primary aim of physics?

Back

To describe the fundamental aspects of the universe.

Front

What is the weight of a 40 N object at rest on Earth?

Back

The weight is -40 N, indicating the force of gravity acting downward.

Front

Define weight in physics.

Back

Weight is the force exerted by gravity on an object, calculated as the mass of the object multiplied by the acceleration due to gravity (W = mg).

Front

What is the relationship between mass and weight?

Back

Weight is the product of mass and gravitational acceleration (W = mg). Mass is a measure of the amount of matter in an object, while weight is the force acting on that mass due to gravity.

Front

Explain the concept of acceleration.

Back

Acceleration is the rate of change of velocity of an object. It can be caused by a change in speed or direction.

Front

What does it mean for an object to be in equilibrium?

Back

An object is in equilibrium when the net force acting on it is zero, resulting in no acceleration.

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net external force.