Basic mechanics 1

What kind of energy is in a rock at the edge of a cliff?

• Potential

• Kinetic

What kind of energy is in a moving skateboard?

• Kinetic

• Potential

What is needed to calculate work?

• acceleration and velocity

• force and distance

• time and distance

• speed and distance

What is the unit of measurement for work?

• meters

• newtons

• Joules

• m/s

You have to push with 15 N of force to move it 10 meters. How much work do you do?

• 15 joules

• 150 joules

• 1.5 joules

• 0.67 joules

Newtons are the unit for _____________.

• Acceleration

• Force

• Work

• Distance

You exert 200 J of work by pulling on an object with 20 N of force. What distance is the object moved?

• 4000 m

• 0.1 m

• 10 m

• 10 J

What is the difference between calculating power and work?

• Work takes into account the time it takes to complete a task

• Power takes into account the time it takes to complete a task

• Power is force/area

• Work is force/area

Work (or energy) can be defined as

• something hard

• force exerted times distance moved

• power in watts

• the force required to turn a spanner

The SI unit of mass is the

• newton

• weight

• kilogram

• force