1st Semester Physics Final Review

Front

What is the purpose of an airbag in a vehicle?

Back

An airbag changes a person's momentum over a longer time interval, reducing the force experienced during a collision.

Front

How do you calculate work done when a force is applied?

Back

Work (W) is calculated using the formula W = F * d, where F is the force applied and d is the distance moved in the direction of the force.

Front

What is the unit of work in the International System of Units (SI)?

Back

The unit of work is the Joule (J).

Front

Define potential energy.

Back

Potential energy is the energy stored in an object due to its position, condition, or configuration, such as gravitational potential energy or elastic potential energy.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's second law, the relationship is given by F = m * a, where F is force, m is mass, and a is acceleration.

Front

What happens to the kinetic energy of an object if its speed doubles?

Back

If the speed of an object doubles, its kinetic energy increases by a factor of four, since KE = 1/2 mv².

Front

What is the principle of conservation of energy?

Back

The principle states that energy cannot be created or destroyed, only transformed from one form to another.

Front

How does increasing the time of impact affect the force experienced during a collision?

Back

Increasing the time of impact decreases the force experienced, as force is inversely proportional to the time over which momentum changes.

Front

What is the formula for calculating gravitational potential energy?

Back

Gravitational potential energy (PE) is calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.