Question

Tick (~) the most appropriate answer.
1. The ability to do work is called :
(a) power
(b) efficiency
(c) energy
(d) force
2. The work done by a body is the product of
displacement and :
(a) power
(b) energy
(c) force
(d) pressure
3. An old unit of energy is :
(a) newton
(b) joule
(c) calorie
(d) newton-metre
4. 50 joules work is done, when a force
'F' causes a displacement of 10 m. The
magnitude of force is :
(a) 5 pascal (b) 5 newton
(c) 5 newton-metre
(d) none of these
5. When is the work done in the following
situation :
(i) A girl pushing a wall
(ii) A boy carrying a suitcase in his hand.
(iii) A stone falling freely
(iv) A boy climbing up the stairs
(a) (i) and (ii) (b) (i) and (iii)
(c) (ii) and (iv) (d) (iii) and (iv)​

Answer 1

Answer:

1 ques ka energy and 2 ka force and 3 ka calorie and 4 ka 5 newton - metre and 5 ka ii and iv

Answer 2

Answer:

1- Energy

2- Force

3- Joule

4- 5 pascal

5- ii and iv