Question

Gravitational potential difference between surface
of a planet and a point situated at a height of 40m
above its surface is 4 J/kg. If gravitational field is
uniform, then the work done in taking a 2 kg body.upto height 5 meter above surface will be
(2) 1 J
(3) 4J (4) 10 J
(1) 2 J​

Answer 1

Answer:

Perfect questions for guys interested in maths..

2. The value of x + x(xx) when x = 2 is:

(a) 10, (b) 16, (c) 18, (d) 36, (e) 64

Solution:

x + x(xx)

Put the value of x = 2 in the above expression we get,

2 + 2(22)

= 2 + 2(2 × 2)

= 2 + 2(4)

= 2 + 8

= 10

Answer: (a)