7th Grade 1st Semester Final Exam Part 1

Front

True or False: All solid objects deform when forces are applied to them.

Back

True

Front

What happens to energy when objects slide against each other due to friction?

Back

Energy transfers into heat/temperature increase.

Front

How can force be distributed to reduce damage during impact?

Back

By spreading force over a larger area.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object when it comes into contact with another surface.

Front

What is the relationship between force and motion?

Back

Force causes an object to start moving, stop moving, or change direction.

Front

What is a protective device in the context of collisions?

Back

A protective device is a mechanism designed to reduce the force experienced by objects during a collision.

Front

What is deformation in physics?

Back

Deformation is the change in shape or size of an object when a force is applied.

Front

What is the role of energy in motion?

Back

Energy is required to perform work, which includes moving objects.

Front

What is the difference between static and kinetic friction?

Back

Static friction acts on objects that are not moving, while kinetic friction acts on objects that are sliding past each other.

Front

What is the formula for calculating force?

Back

Force = mass × acceleration (F = m × a).