Matter and Energy - Semester Test

Front

What is the scalar quantity that measures the distance traveled per unit time?

Back

Speed

Front

What class of lever is used when the input force is applied between the fulcrum and the output force?

Back

Class 3 lever

Front

What is the SI unit of work?

Back

Joule

Front

How do you calculate the efficiency of a machine?

Back

Efficiency = (Work Output / Work Input) x 100%

Front

What force opposes the relative motion of two surfaces in contact?

Back

Friction

Front

What is the definition of energy?

Back

The capacity to do work.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).

Front

What is the formula for calculating work done?

Back

Work = Force x Distance x cos(θ) where θ is the angle between the force and the direction of motion.

Front

What is kinetic energy?

Back

The energy an object possesses due to its motion, calculated as KE = 1/2 mv².

Front

What is potential energy?

Back

The energy stored in an object due to its position or configuration, calculated as PE = mgh.