Calculate the kinetic energy of a kg ball moving at m/s.
Salam Academy Original Practice · Proposed mark scheme
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12 questions
A kg box is lifted m. Calculate the gain in gravitational potential energy ( N/kg).
Salam Academy Original Practice · Proposed mark scheme
A N force pushes a crate m in the direction of the force. Calculate the work done.
Salam Academy Original Practice · Proposed mark scheme
An appliance transfers J of energy in s. Calculate its power.
Salam Academy Original Practice · Proposed mark scheme
A motor is supplied with J of energy and does J of useful work. Calculate its efficiency as a percentage.
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A stretched catapult holds energy in its
Salam Academy Original Practice · Proposed mark scheme
The principle of conservation of energy says that energy
Salam Academy Original Practice · Proposed mark scheme
A ball is dropped from a height of m. Ignoring air resistance, calculate its speed just before it lands. Take N/kg.
Salam Academy Original Practice · Proposed mark scheme
A motor lifts a load of weight N through m in s. Calculate its useful power output.
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A car's speed doubles. By what factor does its kinetic energy increase?
Salam Academy Original Practice · Proposed mark scheme
A W lamp is efficient. Calculate the energy it wastes in s.
Salam Academy Original Practice · Proposed mark scheme
A roller-coaster car of mass kg starts from rest and descends a vertical height of m. of the GPE lost is transferred to thermal energy by friction. Calculate its speed at the bottom ( N/kg).
Salam Academy Original Practice · Proposed mark scheme