AS Level Physics Quiz 1

What is a reasonable estimate for the density of sand?

• 2 × 10² g.cm^–3

• 2 × 10³ g.cm^–3

• 2 × 10¹ kg.m^–3

• 2 × 10^3.kg.m^–3

Which physical quantity could have units of N.s^2.m^–1?

• acceleration

• force

• mass

• momentum

A velocity vector is shown.

What are the components of the velocity vector in the northerly and in the easterly directions?

• A Component of vector in northerly direction = 38 m/s

  Component of vector in easterly direction = 38 m/s

• B Component of vector in northerly direction = 38 m/s

  Component of vector in easterly direction = 65 m/s

• C Component of vector in northerly direction = 65 m/s

  Component of vector in easterly direction = 38 m/s

• D Component of vector in northerly direction = 65 m/s

  Component of vector in easterly direction = 65 m/s

A micrometer screw gauge is used to measure the diameter of a copper wire.

The reading with the wire in position is shown in diagram 1. The wire is removed and the jaws of

the micrometer are closed.

The new reading is shown in diagram 2.

What is the diameter of the wire?

• A 1.95 mm

• B 2.45 mm

• C 2.59 mm

• D 2.73 mm

A student measures the current and the potential difference for a resistor in a circuit.

current = (50.00 ± 0.01) mA

potential difference = (500.0 ± 0.1) mV

The measurements are used to calculate the resistance of the resistor.

What is the percentage uncertainty in the calculated resistance?

• A 0.0002%

• B 0.0004%

• C 0.02%

• D 0.04%

Four cars, A, B, C and D, move from rest in a straight line. The cars take the same time to accelerate to a velocity of 60 km.h^–1. Their velocity–time graphs are shown.

Which car reaches a velocity of 60 km.h^–1 in the shortest distance?

• A

• B

• C

• D

A cannon fires a cannonball with an initial speed v at an angle α to the horizontal.

Which equation is correct for the maximum height H reached?

• 
• 
• 
• 

A ball strikes a horizontal surface with momentum p at an angle θ to the surface, as shown.

The ball rebounds with the same magnitude of momentum at an angle θ to the surface.

The ball is in contact with the surface for time t.

What is the magnitude of the average resultant force acting on the ball during the collision?

• A zero

• B 2p/t

• C (2pcosθ)/t

• D (2psinθ)/t

A skydiver, who is falling vertically through the air, opens his parachute.

Which row describes the velocity of the skydiver immediately after he opens his parachute?

• A

• B

• C

• D

A stationary firework explodes into four fragments which travel in different directions in a horizontal plane. The diagram shows the velocity and mass of each fragment.

What is the speed v of fragment X?

• A 200 m.s^–1

• B 240 m.s^–1

• C 300 m.s^–1

• D 360 m.s^–1