Category 2 Retest

Front

What is kinetic energy?

Back

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

Front

At which point in a pendulum's swing is kinetic energy highest?

Back

Kinetic energy is highest at the lowest point of the swing.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state. For example, an object at a height has gravitational potential energy.

Front

When does a yo-yo have the most potential energy?

Back

A yo-yo has the most potential energy when it is at its highest point.

Front

What is the formula to calculate force?

Back

Force is calculated using the formula F = ma, where F is force, m is mass, and a is acceleration.

Front

How much force is needed to accelerate a 25kg bowling ball at 2m/s²?

Back

50N (calculated using F = ma: 25kg * 2m/s² = 50N).

Front

What is net force?

Back

Net force is the total force acting on an object after all the forces are combined. It determines the object's acceleration.

Front

If you push a box with 35 N and your friend pushes with 25 N in the same direction, what is the net force?

Back

60 N unbalanced to the right (35N + 25N = 60N).

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy increases with mass; if mass increases while velocity remains constant, kinetic energy increases.

Front

Which has more kinetic energy: a car or a tractor-trailer traveling at the same speed?

Back

A tractor-trailer traveling at 80 mph has more kinetic energy due to its greater mass.