, 2
1.1
A stuntman with a mass of 75 kg is using a skateboard to perform a jump.
He starts at the top of the ramp, 20 m above ground.
Which energy store increases as the stuntman moves towards position B?
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1 mark]
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1.2
The stuntman, skateboard and ramp can be modelled as a closed system.
What is meant by the term ‘closed system’?
__________________________________[1
mark]
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1.3 Which of the following is the correct equation for calculating the kinetic
energy of an object?
Tick ( ) one box. [1 mark]
𝐸=𝑚×𝑔×ℎ
𝐸=0.5×𝑚×𝑣2
, 3
𝐸=𝑚×𝑣
𝐸=0.5×𝑚×𝑔2
1.4 The stuntman heads down the ramp towards position B.
The skateboard has a mass of 3 kg.
The gravitational field strength is 9.8 N/kg.
Calculate the maximum possible velocity of both the stuntman the
stuntman and skateboard when at position B.
[5 marks]
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__________________________________
__________________________________
__________________________________
__________________________________
__________________________________
__________________________________
__________________________________
__________________________________
After descending the ramp, the stuntman leaves the ramp and reaches a
1.5
maximum height of only 14 m at point C, which is less than the ramp height
of 20 m.
Explain why.
__________________________________[
2 marks]
__________________________________
__________________________________
1.1
A stuntman with a mass of 75 kg is using a skateboard to perform a jump.
He starts at the top of the ramp, 20 m above ground.
Which energy store increases as the stuntman moves towards position B?
__________________________________[
1 mark]
__________________________________
1.2
The stuntman, skateboard and ramp can be modelled as a closed system.
What is meant by the term ‘closed system’?
__________________________________[1
mark]
__________________________________
1.3 Which of the following is the correct equation for calculating the kinetic
energy of an object?
Tick ( ) one box. [1 mark]
𝐸=𝑚×𝑔×ℎ
𝐸=0.5×𝑚×𝑣2
, 3
𝐸=𝑚×𝑣
𝐸=0.5×𝑚×𝑔2
1.4 The stuntman heads down the ramp towards position B.
The skateboard has a mass of 3 kg.
The gravitational field strength is 9.8 N/kg.
Calculate the maximum possible velocity of both the stuntman the
stuntman and skateboard when at position B.
[5 marks]
__________________________________
__________________________________
__________________________________
__________________________________
__________________________________
__________________________________
__________________________________
__________________________________
__________________________________
After descending the ramp, the stuntman leaves the ramp and reaches a
1.5
maximum height of only 14 m at point C, which is less than the ramp height
of 20 m.
Explain why.
__________________________________[
2 marks]
__________________________________
__________________________________
