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Syllabus

1. Velocity acquired by the body

2. Change in momentum of the body

4. At a certain instant, an auto driver is driving at a speed of 30 km h

^{-1}. Then, he uniformly accelerates the auto^{-1}. What is the average speed of the auto? What isIn a rough horizontal surface

Q.15. 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

Ch.gravitation

Actually I am not understanding the solution done by the previous expert.....!

g= 9.8 ms^{–2}, find:(a) the height from which the ball was released,

(b) the velocity with which the ball will strike the ground.

.vivek... Alankar.. Abhi.......

Plz give me answer very urgent

Explain all the things involved in the equations (torque,momentum,etc.)

Q.20. A ball is thrown vertically upwards from the top of a tower with an initial velocity of 19.6 m ${s}^{-1}$. The ball reaches the ground after 5 s. Calculate :

(i) the height of the tower,

(ii) the velocity of ball on reaching the ground.

Take g = 9.8 m ${s}^{-2}$.

1. Initial momentum of the bullet.

2. Final momentum of the bullet.

3. Retardation caused by the wooden block.

4. Resistive force exerted by the wooden block.

9. A truck of mass 2500kg is moving at the speed of 54 km/h and its acted upon by two forces of SOON due to the engine and a retarding force of 100N due to friction. Calculate the acceleration of the truck and distance moves by it in 10 minutes?

question 14 & 15.

8. On a cold, rainy day, you find yourself in a car with a dead battery. You must push the car to move it and get it started. Why can't you move the car by remaining comfartably inside and pushing against the dashboard?