Lilja Test Practice - 1 - Force and Motion

Front

What is a force?

Back

A force is a push or a pull that can cause an object to move, stop, or change direction.

Front

What is the formula for average speed?

Back

Average speed is calculated as total distance travelled divided by total time.

Front

What is the average speed if a car travels 10 meters in 7 seconds?

Back

The average speed is approximately 1.43 m/s.

Front

What happens when two teams pull with the same amount of force?

Back

They will not move at all.

Front

What is the unit of force?

Back

The unit of force is Newton (N).

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

What is the effect of balanced forces on an object?

Back

Balanced forces do not cause a change in the motion of an object.

Front

What is the effect of unbalanced forces on an object?

Back

Unbalanced forces cause an object to accelerate in the direction of the net force.