Energy Worksheet
Energy Worksheet — velocity needs to be in m/s, mass needs to be in kg, distances need to be in meters
1) What is the kinetic energy of a .750kg baseball that is moving at 175 km/hr?
2) What is the kinetic energy of a clown that has a mass of 243 kg that was shot out of a cannon at a velocity of 35 miles/hour? (39 in = 1 m)
3) What is the potential energy of a tight-rope walker that is standing on the high rope at a height of 9.5 m with a mass of 130 pounds? (1kg = 2.2Lb)
4) What is the potential energy of a full, stuck rollercoaster car is it stopped on the top of a hill that was 75 m high and has a mass of 500kg. The coaster holds 25 people with an average mass of 200kg.
5) If a swing has 400J of potential energy at the top of its path, and only 96J of PE at the bottom of its path, how much kinetic energy does it have at the bottom of its path, if energy is perfectly conserved?
6) If I dropped a marker with a mass of .25kg from a height of 2.5m (and all energy is conserved), how much kinetic energy would it have just before it hit the ground?
1) 886.1 J Hint – mind your units in the formula 1/2mv^2
2) 30311.6 J Hint – mind your units (mile=5,280ft)
3) 5501 J Hint – mgh and units
4) 4.04*10^6 J Hint – the car has people in it…which affects its mass
5) 304 J Hint – all energy is conserved, none lost to friction or heat
6) 6.125 J Hint – how much potential energy did it have? Where did it go?
Hosted by 