Practise questions · Salam Academy

SA-9709-P4-EW-0011 markL1 FoundationCalculatorKE and PE

Find the kinetic energy of a car of mass

1500

kg moving at

20\ \text{m s}^{-1}

.

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW-0021 markL1 FoundationCalculatorKE and PE

Find the gain in potential energy when a

50

kg mass is raised through

3

m.

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW-0032 marksL1 FoundationCalculatorConservation of energy

A ball is dropped from rest from a height of

20

m. Ignoring air resistance, use conservation of energy to find its speed just before it hits the ground.

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW-0042 marksL1 FoundationCalculatorConservation of energy

A particle slides from rest down a smooth curved slope, descending a vertical height of

5

m. Find its speed at the bottom.

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW2-0011 markL1 FoundationCalculatorKE and PE

Find the kinetic energy of a ball of mass

0.4

kg moving at

15\ \text{m s}^{-1}

.

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW2-0021 markL1 FoundationCalculatorKE and PE

A climber of mass

70

kg climbs through a vertical height of

120

m. Find the gain in gravitational potential energy, in kJ.

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW2-0032 marksL1 FoundationCalculatorKE and PE

A particle of mass

2

kg has kinetic energy

100

J. Find its speed.

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW2-0042 marksL1 FoundationCalculatorConservation of energy

A ball is thrown vertically upwards at

14\ \text{m s}^{-1}

. Use conservation of energy to find the greatest height it reaches above the point of projection.

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW2-0052 marksL1 FoundationCalculatorConservation of energy

A particle is released from rest at the top of a smooth curved slope and descends a vertical height of

7.2

m. Find its speed at the bottom.

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW2-0091 markL1 FoundationCalculatorConservation of energy

A particle slides from rest down a smooth curved slope. Its speed at the bottom depends on

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW-0113 marksL2 StandardCalculatorConservation of energy

A ball is thrown at

12\ \text{m s}^{-1}

from a point

5

m above the ground. Ignoring air resistance, find its speed when it hits the ground, correct to 3 significant figures.

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW2-0062 marksL2 StandardCalculatorConservation of energy

A pendulum bob is released from rest at a point

0.45

m above its lowest point. Ignoring air resistance, find its speed at the lowest point.

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW2-0082 marksL2 StandardCalculatorKE and PE

A car of mass

1000

kg speeds up from

10\ \text{m s}^{-1}

to

20\ \text{m s}^{-1}

. Find the increase in its kinetic energy.

Salam Academy Original Practice · Proposed mark scheme

SA-9709-P4-EW2-0073 marksL3 ExamCalculatorConservation of energy

A particle is projected up a line of greatest slope of a smooth plane inclined at

30^\circ

, with speed

8\ \text{m s}^{-1}

. Use energy to find the distance it travels up the plane before coming to rest.

Salam Academy Original Practice · Proposed mark scheme

Question bank