Use energy conservation to find speeds and heights
10th grade (Year 11 in England) · 16 questions · Common Core: NGSS.HS-PS3-1, NGSS.HS-PS3-2 · England: GCSE Combined Science: Energy
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Score/ 16
Question 1
A 10 kg object falls 10 m. 25 % of its gravitational potential energy is transferred to the surroundings by air resistance. How much kinetic energy does it have at the bottom, in J? (g = 9.8 N/kg; give 1 decimal place)
AnswerJ
Question 2
A skateboarder leaves the bottom of a ramp at 7 m/s. Ignoring friction, what is the greatest height they can reach, in m? (g = 9.8 N/kg; give 2 decimal places)
Answerm
Question 3
A ball is dropped from a height of 5 m. Ignoring air resistance, how fast is it moving just before it hits the ground, in m/s? (g = 9.8 N/kg; give 1 decimal place)
Answerm/s
Question 4
A 10 kg object falls 5 m. 40 % of its gravitational potential energy is transferred to the surroundings by air resistance. How much kinetic energy does it have at the bottom, in J? (g = 9.8 N/kg; give 1 decimal place)
AnswerJ
Question 5
A skateboarder leaves the bottom of a ramp at 7 m/s. Ignoring friction, what is the greatest height they can reach, in m? (g = 9.8 N/kg; give 2 decimal places)
Answerm
Question 6
A ball is dropped from a height of 45 m. Ignoring air resistance, how fast is it moving just before it hits the ground, in m/s? (g = 9.8 N/kg; give 1 decimal place)
Answerm/s
Question 7
A 5 kg object falls 30 m. 25 % of its gravitational potential energy is transferred to the surroundings by air resistance. How much kinetic energy does it have at the bottom, in J? (g = 9.8 N/kg; give 1 decimal place)
AnswerJ
Question 8
A skateboarder leaves the bottom of a ramp at 10 m/s. Ignoring friction, what is the greatest height they can reach, in m? (g = 9.8 N/kg; give 2 decimal places)
Answerm
Question 9
A ball is dropped from a height of 2 m. Ignoring air resistance, how fast is it moving just before it hits the ground, in m/s? (g = 9.8 N/kg; give 1 decimal place)
Answerm/s
Question 10
A 60 kg object falls 10 m. 40 % of its gravitational potential energy is transferred to the surroundings by air resistance. How much kinetic energy does it have at the bottom, in J? (g = 9.8 N/kg; give 1 decimal place)
AnswerJ
Question 11
A skateboarder leaves the bottom of a ramp at 20 m/s. Ignoring friction, what is the greatest height they can reach, in m? (g = 9.8 N/kg; give 2 decimal places)
Answerm
Question 12
A ball is dropped from a height of 10 m. Ignoring air resistance, how fast is it moving just before it hits the ground, in m/s? (g = 9.8 N/kg; give 1 decimal place)
Answerm/s
Question 13
A 60 kg object falls 30 m. 40 % of its gravitational potential energy is transferred to the surroundings by air resistance. How much kinetic energy does it have at the bottom, in J? (g = 9.8 N/kg; give 1 decimal place)
AnswerJ
Question 14
A skateboarder leaves the bottom of a ramp at 5 m/s. Ignoring friction, what is the greatest height they can reach, in m? (g = 9.8 N/kg; give 2 decimal places)
Answerm
Question 15
A ball is dropped from a height of 2 m. Ignoring air resistance, how fast is it moving just before it hits the ground, in m/s? (g = 9.8 N/kg; give 1 decimal place)
Answerm/s
Question 16
A 0.5 kg object falls 10 m. 20 % of its gravitational potential energy is transferred to the surroundings by air resistance. How much kinetic energy does it have at the bottom, in J? (g = 9.8 N/kg; give 1 decimal place)
AnswerJ
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