Topic 3 Quiz

Which one of these best respresents the relationship between energy transferred and work done?
1. Energy transferred is less than work done
2. Energy transferred = work done
3. Energy transferred = 1/work done
4. The two are not related
Which of these is the correct equation relating force and work?
1. W = F/d
2. W = d/F
3. W = Fd
4. F = dW
Which of these statements about force and work is correct?
1. The work done is in joules, and is in the same direction as the force in newtons
2. The work done is in joules, and is in the opposite direction as the force in newtons
3. The work done is in joules, and is in the at right angles to the force in newtons.
4. Force and work are not related
An explorer training for an arctic expedition is training by dragging a tyre of mass 30 kg across a beach. He exerts a force of 150 N on the tyre. What is the work done as he crosses 100 m of beach
1. 300 J
2. 1500 J
3. 3000 J
4. 15 000 J
Which one of these statements is correct about friction?
1. It has the same direction as the forward force.
2. It only affects stationary objects.
3. Work done against friction mostly results in heat.
4. Heat can be turned into work done by the reverse process.
The energy in a deformed material is called:
1. kinetic energy
2. chemical energy
3. internal energy
4. elastic potential energy
Which one of these is NOT an example of elastic potential energy?
1. A spring wound up in a clockwork motor.
2. Water raised behind a dam
3. A stretched catapult.
4. An archer's bow ready to fire an arrow.
Which one of these objects has zero kinetic energy?
1. An arrow flying from a bow to its target.
2. A spinning fywheel
3. A pendulum swinging from side to side
4. A book resting on a chair.
The equation for kinetic energy is:
1. Ek = 1/2 mv^2
2. Ek = 1/2 mv
3. Ek = 1/2 m/v
4. Ek = 1/2(mv)^2
The units for kinetic energy are:
1. newtons
2. metres per second
3. joules
4. metre seconds