Year 10 IGCSE PHYSICS REVIEW

When does an object falling vertically through the air reach terminal velocity?

• when the acceleration of the object becomes negative

• when the acceleration of the object is equal to g

• when the air resistance equals the weight of the object

• when the air resistance is greater than the weight of the object

An athlete runs a 100m race in a straight line. The table shows how his speed changes with time for the first 0.5s of the race. What is the average acceleration of the athlete between time 2.0s and time 3.0s?

• 1.6m/s^2

• 1.9m/s^2

• 4.9m/s^2

• 5.7m/s^2

Tags

NGSS.HS-PS2-1

The gravitational field strength on the Moon is 1.6N/kg. An astronaut has a mass of 75kg. What is the weight of the astronaut on the Moon?

• 47N

• 75N

• 120N

• 740N

Tags

NGSS.HS-PS2-1

Two objects P and Q are placed in a beaker containing a liquid. Object P floats in the liquid and object Q sinks. Which row for the densities of object P, object Q and the liquid is possible?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-2

A ball of mass 0.12kg is hit by a tennis player. The velocity of the ball changes from 0m/s to 5m/s in 0.60s. What is the average resultant force acting on the ball while it is being hit?

• 1.0N

• 2.5N

• 3.6N

• 8.3N

Tags

NGSS.HS-PS2-1

A balloon and a mass are attached to a rod that is pivoted at a fixed point P. The balloon is filled with helium, which is a gas that is less dense than air. The balloon filled with helium applies an upward force on the rod. The rod is horizontal and in equilibrium. Which action causes the rod to rotate clockwise?

• moving the balloon to the 40cm mark and the mass to the 30cm mark

• moving the balloon to the 20cm mark and the mass to the 10cm mark

• moving the balloon to the 25cm mark and the mass to the 25cm mark

• moving the balloon to the 20cm mark and the mass to the 30cm mark

Tags

NGSS.HS-PS2-1

A hole is made in a square tile of uniform thickness. The diagram shows the tile hanging loosely on a nail. Where is the centre of gravity of the tile?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

An object of mass 0.16kg is moving forwards at a speed of 0.50m/s. A second object of mass 0.10kg is at rest. The first object strikes the second object. After the collision, the second object moves forwards at a speed of 0.50m/ s. What is the speed of the first object after the collision?

• 0m/s

• 0.19m/s

• 0.31m/s

• 0.5m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A ball is at rest at the top of a hill. The ball rolls down the hill. At the bottom of the hill the ball hits a wall and stops. Which energy changes occur?

• gravitational potential energy → internal energy → kinetic energy

• gravitational potential energy → kinetic energy → internal energy

• kinetic energy → gravitational potential energy → internal energy

• kinetic energy → internal energy → gravitational potential energy

Tags

NGSS.HS-PS3-2

A man climbs a ladder. Which quantities can be used to calculate the useful power of the man?

• the weight of the man and the time taken only

• the weight of the man and the vertical distance moved only

• the work done by the man and the time taken only

• the work done by the man and the vertical distance moved only