Paper 3, Higher

Resolve a 50 N force acting at 30° above the horizontal into horizontal and vertical components.

Which quantity is a vector?

A 12 V battery is connected to a 6 Ω resistor in parallel with a 12 Ω resistor. Calculate the total current from the battery.

Explain why atmospheric pressure decreases with height.

A car of mass 1000 kg travelling at 20 m/s brakes to a stop in 4.0 s. Calculate the deceleration and braking force.

Calculate the energy transferred when 20 C of charge passes through a potential difference of 12 V.

A 75 kg climber climbs 12 m in 40 s. Calculate the work done against gravity and the power output. (g = 9.8 N/kg)

A ball is thrown and travels 18 m horizontally in 1.2 s. Calculate its average horizontal speed and explain why the speed in this direction stays roughly constant.

Calculate the energy transferred when 3000 C of charge passes through a potential difference of 230 V.

Calculate the braking distance of a car of mass 1200 kg travelling at 25 m/s if the braking force is 7500 N.

Explain why a light-dependent resistor is used in automatic street lights.

Describe an experiment to investigate how force affects the acceleration of a trolley.

Explain why touching the live wire is dangerous even if the switch is off.

Explain inertia and why heavier vehicles need longer to stop.

Describe the electric field around a negatively charged sphere.

A car's reaction time is 0.7 s at 20 m/s. Calculate the thinking distance.

Explain why a fuse is used in a plug.

Sketch and describe the velocity–time graph of a car that accelerates uniformly, travels at constant velocity and then decelerates uniformly.

Explain why the resistance of a filament lamp increases as the current increases.

Calculate the density of an object with mass 540 g and volume 200 cm³.

Calculate the weight of a 65 kg object on Earth (g = 9.8 N/kg).

Calculate the average speed of a runner who travels 400 m in 50 s.

Calculate the current in a 4 Ω resistor connected to a 12 V supply.

Describe how to plot the magnetic field pattern of a bar magnet.

Calculate the density of an object with mass 2.7 kg and volume 0.001 m³.

Calculate the weight of a 0.25 kg object on Earth (g = 9.8 N/kg).

Calculate the average speed of a runner who travels 3000 m in 600 s.

Calculate the current in a 46 Ω resistor connected to a 230 V supply.

Calculate the force on a wire of length 0.5 m carrying 3 A at right angles to a magnetic field of 0.2 T.

Describe how to measure the density of an irregular stone.

Calculate the work done when a force of 250 N moves an object 12 m in the direction of the force.

A car changes speed from 0 m/s to 24 m/s in 8 s. Calculate its acceleration.

Calculate the current in a 1.5 Ω resistor connected to a 6 V supply.

What is the unit of potential difference?