Kinematics and Energy TEST

What is the energy transfer pathway, when energy is transferred by moving charges?

• Mechanically

• Electrically

• By Radiation

• By Heating

What is the energy transfer pathway of a force moving an object through a distance?

• Mechanically

• Electrically

• By Radiation

• By Heating

What is the same as Work Done?

• Power

• Energy Transferred

• Force

• Magnetism

What is the energy transfer pathway, when energy is transferred as a wave, for example light.

• Mechanically

• Electrically

• By Radiation

• By Heating

The total mass of a cyclist and their bike is 95 kg. Ignoring the effects of air resistance and friction with the road, how much work is done by the rider to increase their speed from 2.0 m/s to 6.0 m/s?

(3 marks)

• 190 J

• 760 J

• 1500 J

• 1700 J

A car starts from rest and accelerates down a slope. The acceleration remains constant as the car travels from the top to the bottom of the slope. The average speed of the car is 2 m/s. The speed of the car as it reaches the bottom of the slope is:
(2 marks)

• Between 0 m/s and 2 m/s

• 2 m/s

• Between 2 m/s and 4 m/s

• 4 m/s

• Greater than 4 m/s

A student predicts that a steel ball dropped from rest from a height of 2 m will hit the floor after 0.63 seconds. In their calculation, they used an approximate value for the acceleration due to gravity of g = 10 m/s². The accepted value for the acceleration due to gravity is g = 9.8 m/s². This means their calculated time will be:

(3 marks)

• unaffected

• too long by about 1%

• too short by about 1%

• too long by about 0.2 seconds

• too short by about 0.2 seconds

A firework uses a chemical reaction to create a thrust force. This thrust force does work on the rocket to change the velocity and height above the ground. Ignoring air resistance, the relationship between the work done (WD) by the thrust force, the change in kinetic energy (ΔKE) of the rocket and the change in gravitational potential energy (ΔGPE) of the rocket is:

(2 marks)

• ΔGPE = WD + ΔKE

• ΔKE = WD + ΔGPE

• WD = ΔGPE + ΔKE

• WD = ΔGPE - ΔKE

A Physics trolley starts from rest and has a constant acceleration. The velocity – time graph is linear as shown. The corresponding graph of velocity against displacement is:
(2 marks)

• 
• 
• 
• 

The pictures shows a pulley in a school Physics lab being used to lift a 1.0 kg mass. When the student pulls the force meter it records a force of 2.6 N. Moving the force meter 40 cm results in the 1.0kg mass being raised by 10 cm. The efficiency of the pulley system is:

(3 marks)

• 100%

• 96%

• 74%

• 25%

• 3.8%