Question

Can someone please help me to answer these questions pls
1) A body of mass 1 kg undergoes a change of velocity of 4m/s in 4s. What
is the force acting on it?
2) If a net force of 7 N was constantly applied on 400 g object at rest, how
long will it take to raise its velocity to 80 m/s?
3) A driver accelerates his car first at the rate of 4 m/s2 and then at the rate
of 8 m/s2
. Calculate the ratio of the forces exerted by the engine?
4) An object of mass 10 g is sliding with a constant velocity of 2 m/s on a
frictionless horizontal table. Calculate the force required to keep the object
moving with the same velocity.
5) A gun of mass 3 kg fires a bullet of mass 30 g. The bullet takes 0.003 s to
move through the barrel of the gun and acquires a velocity of 100 m/s.
Calculate
a) The velocity with which the gun recoils.
b) The force exerted on gunman due to recoil of the gun.
6) A boy of mass 50 kg running 5 m/s jumps onto a 20 kg trolley travelling
in the same direction at 1.5 m/s. Find their common velocity.
7) Two cars each of mass 1000 kg are moving in a straight line but in
opposite directions. The velocity of each car is 5 m/s before the collision
during which they stick together. What will be the velocity of the combined
cars after collision?
8) Two bodies have masses in the ratio 3:4. When a force is applied on the
first body, it moves with an acceleration of 6 m/s². How much acceleration
will the same force produce in the other body?
9) A sphere of mass 25 kg moving with a velocity of 40 m/s collides with
another sphere of mass 15 kg which is at rest. After collision, they move
with the same velocity. Determine the final velocity.
10) Plot a graph between force applied on a body and the acceleration produced
in it, assuming that the magnitude of force is constantly increasing.

Answer 1

Answer:

sorry

Explanation:

i didn't understand

Answer 2

Answer:

questions pls

1) A body of mass 1 kg undergoes a change of velocity of 4m/s in 4s. What

is the force acting on it?

2) If a net force of 7 N was constantly applied on 400 g object at rest, how

long will it take to raise its velocity to 80 m/s?

3) A driver accelerates his car first at the rate of 4 m/s2 and then at the rate

of 8 m/s2

. Calculate the ratio of the forces exerted by the engine?

4) An object of mass 10 g is sliding with a constant velocity of 2 m/s on a

frictionless horizontal table. Calculate the force required to keep the object

moving with the same velocity.

5) A gun of mass 3 kg fires a bullet of mass 30 g. The bullet takes 0.003 s to

move through the barrel of the gun and acquires a velocity of 100 m/s.

Calculate

a) The velocity with which the gun recoils.

b) The force exerted on gunman due to recoil of the

Explanation:

boy of mass 50 kg running 5 m/s jumps onto a 20 kg trolley travelling

in the same direction at 1.5 m/s. Find their common velocity.

7) Two cars each of mass 1000 kg are moving in a straight line but in

opposite directions. The velocity of each car is 5 m/s before the collision

during which they stick together. What will be the velocity of the combined

cars after collision?

8) Two bodies have masses in the ratio 3:4. When a force is applied on the

first body, it moves with an acceleration of 6 m/s². How much acceleration

will the same force produce in the other body?

9) A sphere of mass 25 kg moving with a velocity of 40 m/s collides with

another sphere of mass 15 kg which is at rest. After collision, they move

with the same velocity. Determine the final velocity.

10) Plot a graph between force applied on a body and the acceleration produced

in it, assuming that the magnitude of force is constantly increasing.