Question

9. If the net force acting on a body is doubled, then acceleration of the

body is

a) Halved

b) Doubled

c) Unchanged

d) Tripled [ ]

10. A scooter of mass 120 kg is moving with uniform velocity of

108 km/hr. The force required to stop the vehicle in 10 seconds is

a) 180 N b) 360 N c) 720 N d) 820 N [ ]

11. Chose correct statement from the following :

a) When a conservative force does positive work on body, its

potential energy increases

b) When a body does work against the friction , its kinetic energy

decreases

c) The rate of change of total momentum of a many particle system is

proportional to the net external force acting on the system

d) The rate of change of total momentum of a many particle system is

proportional to the net internal force acting on the system [ ]

12. Two bodies ‘A’ and ‘B’ having masses in the ratio of 1:2 fall from heights

in the ratio 1:2 respectively . The ratio of their potential energy is

a) 1:2 b) 2:1 c) 1:4 d) 4:1​

Answer 1

Bhimrao Ramji Ambedkar (14 April 1891 – 6 December 1956), popularly known as Babasaheb Ambedkar, was an Indian jurist, economist, politician and social reformer who inspired the Dalit Buddhist movement and campaigned against social discrimination towards the untouchables (Dalits), while also supporting the rights of women and labour.