Question

1. Name the two factors on which the force needed
to stop a moving body in a given time, depends
Define linear momentum and state its SL unit.
A body of mass m moving with a velocity v is acted
upon by a force. Write expression for change in
momentum in each of the following cases: (i) when
<< < (1) when - c, and (in) when v << c but
m does not remain constant. Here is the speed of
light
(1) may (1) (m) () Aim)
Show that the rate of change of momentum
= mass x acceleration. Under what condition does
this relation hold?
Two bodies A and B of same mass are moving with
velocities w and 2v respectively. Compare their
(1) inertia (1) momentum. in.) 1 : 1 (i) 1:2
Two balls A and B of masses m and 2m are in
motion with velocities 2v and v respectively.
Compare
(i) their inertia, (u) their momentum, and (i) the
force needed to stop them in the same time.
Ans (1) 1.2 (1) 1 : 1 (1 : 1
State Newton's second law of motion. What
information do you get from it?
How does Newton's second law of motion differ
from first law of motion ?
Write the mathematical form of Newton's second
law of motion State condition if any.
TO State Newton's second law of motion. Under what
condition does it take the form Fma?
11. How can Newton's first law of motion be obtained
from the second law of motion !
12. Draw graphs to show the dependence of
(1) acceleration on force for a constant mass, and
(ii) force on mass for a constant acceleration
13. How does the acceleration produced by a given
force depend on mass of the body ? Draw a graph to
show it.
14. Name the S.L. unit of force and define it.
15. What is the C.G.S. unit of force ? How is it defined?
16. Name the S.I. and C.G.S. units of force. How are
they related ?
17. Why does a glass vessel break when it falls on a
hard floor, but it does not break when it falls on a
carpet?
18. Use Newton's second law of motion to explain the
following:
(a) A cricketer pulls his hands back while catching
a fast moving cricket ball.
(b) An athlete prefers to land on sand instead of
hard floor while taking a high jump.​

Answer 1

Answer:

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Explanation:

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