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WorksheetsConservation of Energy Check
Total questions: 11
Worksheet time: 28mins
The sum of the kinetic and potential energy in a system is known as the system's _____________________ energy.
mechanical
chemical
thermal
combined
At which point in the picture must the cart have the most MECHANICAL energy?
Point 1
Point 2
Point 3
They would all be the same
If a ball tossed into the air has a maximum gravitational potential energy of 5.75 joules, what is its maximum kinetic energy in the same toss?
5.75 joules
11.14 joules
2.88 joules
7.93 joules
A 1.0 kg ball is stationary at the top of a hill that is 10.0 meters in height. The ball rolls down the hill. What is its gravitational potential energy at the bottom of the hill?
0 joules
98 joules
49 joules
38 joules
What is the mechanical energy of the roller coaster car?
100 joules
50 joules
2500 joules
1 joule
What happens when the ball goes from the highest position to the lowest position
PE and KE increases and decreases together
Impossible to know without knowing the mass of the object
the PE decreases while KE increases
If a 0.5 kg ball is thrown up with 250 J of kinetic energy, how high will it go?
(HINT: At the ball's highest point it has stopped.)
KE = 1/2mv2 , PE = mgh
g = 9.8 m/s2
51 m
25.5 m
12.76 m
31.6 m
A cliff diver with a mass of 125 kg jumps off a 50m high cliff, how fast will he be traveling just before he hits the water? (His height at this point is 0m)
(HINT: Find PE first. then KE = 1/2mv2
g = 9.8 m/s2
61,250 m/s
980 m/s
31.3 m/s
247.5 m/s
The skateboarder shown above has a potential energy of 2,800 J and kinetic energy of 0J at a height of 4 meters. How much total mechanical energy will she have after 2 seconds? Neglect friction and air resistance.
2000J
1600J
1400J
2800J
