Physics, asked by Rupayan2005, 6 months ago

of
S
is
$7
kg.
s-2
Time (s)->
Fig. 3.11
(Hint : Acceleration = slope of v-t graph)
Ans. 0.4 N
9! A force causes an acceleration of 10 m s - in a body
mass 500 g. What acceleration will be caused by the
same force in a body of mass 5 kg? Ans. 1 m s-2
ody
10. A cricket ball of mass 150 g moving at a speed of
25 ms-l is brought to rest by a player in
0.03 s. Find the average force applied by the
City player.
Ans. 0.125 N
1r. A force acts for 0.1 s on a body of mass 2.0 kg
initially at rest. The force is then withdrawn and
the body moves with a velocity of 2 m s-1. Find the
magnitude of force.
Ans. 40 N
12. A body of mass 500 g, initially at rest, is acted upon
by a force which causes it to move a distance of
4 m in 2 s, Calculate the force applied. Ans. 1 N
ind 13.
A car of mass 480 kg moving at a speed of 54 km h-
is stopped by applying brakes in 10 s. Calculate the
force applied by the brakes.
- Ans. 720 N
of 14. A car is moving with a uniform velocity of 30 m sl.
N
It is stopped in 2 s by applying a force of 1500 N
for
through its brakes. Calculate : (a) the change in
momentum of car, (b) the retardation produced in
car, and (c) the mass of the car.
Ans. (a) 3000 kg m s' (b) 15 m s-2 (c) 100 kg
15. A bullet of mass 50 g moving with an initial velocity
of 100 m s', strikes a wooden block and comes to
rest after penetrating a distance 2 cm in it.
dy
Calculate : (i) initial momentum of the bullet,
(ii) final momentum of the bullet, (iii) retardation
dy,
caused by the wooden block, and (iv) resistive force
ii)
exerted by the wooden block

Answers

Answered by asadansari4u1993

Answer:

Aggi GB gh

dmvhcjnjcjbhvfchvhxhv cjcjvhvbkvhchvjbhchckgj vjvjcycjvjvjbuvhxtvjbkvyxtcuhitxyhknibyctfyvbuvucuvjvjcycjvjvjbuvhxtvjbkvyxtcuhitxyhknibyctfyvbuvucuvjvjcycjvjvjbuvhxtvjbkvyxtcuhitxyhknibyctfyvbuvucuvjvjcycjvjvjbuvhxtvjbkvyxtcuhitxyhknibyctfyvbuvucudmvhcjnjcjbhvfchvhxhv cjcjvhvbkvhchvjbhchckgj vjvjcycjvjvjbuvhxtvjbkvyxtcuhitxyhknibyctfyvbuvucuvjvjcycjvjvjbuvhxtvjbkvyxtcuhitxyhknibyctfyvbuvucuvjvjcycjvjvjbuvhxtvjbkvyxtcuhitxyhknibyctfyvbuvucuvjvjcycjvjvjbuvhxtvjbkvyxtcuhitxyhknibyctfyvbuvucu

Aggi GB gh

Explanation:

vjvjcycjvjvjbuvhxtvjbkvyxtcuhitxyhknibyctfyvbuvucuvjvjcycjvjvjbuvhxtvjbkvyxtcuhitxyhknibyctfyvbuvucuvjvjcycjvjvjbuvhxtvjbkvyxtcuhitxyhknibyctfyvbuvucuvjvjcycjvjvjbuvhxtvjbkvyxtcuhitxyhknibyctfyvbuvucu

Aggi GB gh

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