Day 4 - 8th Grade Science STAAR Review THMS

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to accelerate, as the net force acting on the object is not zero.

Front

Give an example of an unbalanced force in action.

Back

A golf ball being hit with a club is an example of an unbalanced force.

Front

What happens when forces acting on an object are balanced?

Back

When forces are balanced, the object remains at rest or continues to move at a constant speed in a straight line.

Front

What forces are acting on a cyclist pedaling uphill at a constant speed?

Back

The force of pedaling is equal to and opposite the forces of gravity and friction.

Front

What effect does air friction have on a ball traveling through the air?

Back

Air friction causes the speed of the ball to decrease as it travels through the air.

Front

What is the net force acting on a rocket that has equal upward and downward forces?

Back

The net force is zero, indicating that the rocket is at the peak of its traveled height.

Front

How does a distance-time graph represent constant speed?

Back

A distance-time graph for constant speed shows a straight line with a positive slope.

Front

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

Back

According to Newton's second law, force equals mass times acceleration (F = ma).

Front

What is the definition of gravity?

Back

Gravity is the force that attracts two bodies toward each other, proportional to their masses and inversely proportional to the square of the distance between them.

Front

What is friction?

Back

Friction is the force that opposes the motion of an object, caused by the contact between two surfaces.