Physics Revision Work Energy Power SEC 3/4/5
6 Questions
| Total Attempts: 171
Questions and Answers
- 1.A 2N force pushes a box. The box moves 3.0m. How much work is done?
- A.
6J
- B.
1.5J
- C.
6W
- D.
1.5W
- 2.A 4 kg ball moves with 3m/s. what is its kinetic energy?
- A.
12J
- B.
36J
- C.
18J
- D.
9J
- 3.A tennis ball 200g is 2.0m above the ground. G=10N/kg. How much gravitational potential energy does the ball have?
- A.
4000J
- B.
40J
- C.
100J
- D.
4J
- 4.A electric dry cell (battery) is used to power a lamp. what energy conversion takes place?
- A.
Chemical --> electrical energy
- B.
Chemical --> light energy only
- C.
Chemical --> electrical energy --: heat and light energy
- D.
Chemical --> electrical energy --: heat energy only
- 5.Princple of conservation of energy states that energy cannot be created nor destroyed. Energy is transform from one __________ into another.
- 6.When a ball is thrown up vertically, its ____________energy decreases, while its gravitational potential energy increases
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