PHY 120 Final Exam 2024

Front

What is the formula for kinetic energy?

Back

Kinetic energy (KE) is given by the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

How do you calculate velocity from kinetic energy?

Back

Velocity can be calculated using the formula v = sqrt(2KE/m), where KE is kinetic energy and m is mass.

Front

What happens to an object's speed when acceleration and velocity are in the same direction?

Back

The object will speed up.

Front

How many cups are in 320 fluid ounces?

Back

There are 40 cups in 320 fluid ounces, since 1 cup = 8 fl oz.

Front

What type of energy conversion occurs when an object falls?

Back

The conversion is from potential energy to kinetic energy.

Front

What is the formula for calculating work done?

Back

Work (W) is calculated using the formula W = Fd, where F is force and d is distance.

Front

How do you calculate the work needed to lift an object?

Back

Work needed to lift an object is calculated using W = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the value of gravitational acceleration on Earth?

Back

The value of gravitational acceleration (g) on Earth is approximately 9.81 m/s².

Front

Define potential energy.

Back

Potential energy is the energy stored in an object due to its position or configuration, often related to height in a gravitational field.

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy is directly proportional to the mass of the object; as mass increases, kinetic energy increases if velocity remains constant.