21. Which graph shows a bouncing ball?
Your answer [1]
22. A man lifts a load using a wheelbarrow.
What is the effort needed to lift the load using the wheelbarrow?
A 100 N
B 120 N
C 250 N
D 144 N
Your answer [1]
23. This question is about electrostatic charges.
A charged rod is brought towards a gentle stream of water from a tap.
Explain how the charged rod affects the stream of water.
, [3]
24(a). A student hangs a length of copper wire from the ceiling.
She adds weights to the bottom of the wire and measures the extension of the
wire.
Look at a table of some of her results.
Weight (N) Extension (m)
0 0
2 0.01
4 0.02
6 0.03
8 0.04
10 0.08
12 0.16
i. Plot the values on the graph. Some have been done for you.
ii. Draw a line of best-fit on the graph.
[1]
i. Describe and explain the shape of the graph.
, [3]
(b). Calculate the spring constant for the 0 – 6 N part of the graph.
Use the equation: Force = Spring constant × Extension
Answer = .................................................. N/m [3]
(c). Calculate the work done in stretching the wire to 0.04 m.
Answer = ....................................................... J [2]
25(a). A student investigates collisions of trolleys on a horizontal airtrack.
Write down the two quantities involved with motion which are conserved during
an elastic collision.
, [2]
(b). Trolley A has a mass of 2 kg. Trolley B has a mass of 2.5 kg.
i. Calculate the momentum of each trolley.
Trolley A = .................................................... kg m/s
Trolley B = .................................................... kg m/s
[3]
i. The two trolleys collide and stick together after the collision. Use your
answers to (i) to calculate the speed of the combined trolleys after the
collision.
Record your answer to 2 significant figures.
Answer = ................................................... m/s [3]
26(a). A student wants to find out the depth of a well.
She thinks that she can calculate this by dropping a stone into the well and
timing how long it takes to hear the stone splash at the bottom.
i. Explain how she could use this measurement to find the depth of
the well.
Your answer [1]
22. A man lifts a load using a wheelbarrow.
What is the effort needed to lift the load using the wheelbarrow?
A 100 N
B 120 N
C 250 N
D 144 N
Your answer [1]
23. This question is about electrostatic charges.
A charged rod is brought towards a gentle stream of water from a tap.
Explain how the charged rod affects the stream of water.
, [3]
24(a). A student hangs a length of copper wire from the ceiling.
She adds weights to the bottom of the wire and measures the extension of the
wire.
Look at a table of some of her results.
Weight (N) Extension (m)
0 0
2 0.01
4 0.02
6 0.03
8 0.04
10 0.08
12 0.16
i. Plot the values on the graph. Some have been done for you.
ii. Draw a line of best-fit on the graph.
[1]
i. Describe and explain the shape of the graph.
, [3]
(b). Calculate the spring constant for the 0 – 6 N part of the graph.
Use the equation: Force = Spring constant × Extension
Answer = .................................................. N/m [3]
(c). Calculate the work done in stretching the wire to 0.04 m.
Answer = ....................................................... J [2]
25(a). A student investigates collisions of trolleys on a horizontal airtrack.
Write down the two quantities involved with motion which are conserved during
an elastic collision.
, [2]
(b). Trolley A has a mass of 2 kg. Trolley B has a mass of 2.5 kg.
i. Calculate the momentum of each trolley.
Trolley A = .................................................... kg m/s
Trolley B = .................................................... kg m/s
[3]
i. The two trolleys collide and stick together after the collision. Use your
answers to (i) to calculate the speed of the combined trolleys after the
collision.
Record your answer to 2 significant figures.
Answer = ................................................... m/s [3]
26(a). A student wants to find out the depth of a well.
She thinks that she can calculate this by dropping a stone into the well and
timing how long it takes to hear the stone splash at the bottom.
i. Explain how she could use this measurement to find the depth of
the well.
