Energy transformations

Front

Force needed to give a 20 kg object starting at rest a kinetic energy of 400 Joules after 4 meters?

Back

100 N

Front

What is the height you need to lift a 20 kg rock to give it 1000 J of potential energy?

Back

5 m

Front

If a 30 kg rock had 6000 J of potential energy, what is the kinetic energy of the rock it fell 20 m just before it hits the ground?

Back

6000 J

Front

Kinetic energy of a 2 kg rock thrown at 30 m/s?

Back

900 J

Front

Potential energy of a 3 kg cat about to jump from a 30 m tall tree?

Back

900 J

Front

Work done on lifting a 4 kg dog 15 meters up with a pulley system?

Back

600 J

Front

Speed of a 250 kg giraffe with kinetic energy of 800 J?

Back

2.53 m/s

Front

Efficiency of a ramp raising a 20 kg box 3 m with 100 N force over 7 m?

Back

85.71 %

Front

What is the mass of a big truck that has 230000 J of kinetic energy that is going 15 m/s?

Back

2044.44 kg

Front

What is the height you need to drop a 5 kg water balloon to give it 250 J of kinetic energy? Options: 5 m, 10 m, 50 m, 15 m

Back

5 m