PROBLEM No 3.2 Class X / SSC-ΙI丨Chapter # 3 (A person hears the echo of his own sound from distant hill after 2 seconds. How far away is the person from the hill, if the speed of the sound is 330ms-1.)

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PROBLEM No 3.2

                A person hears the echo of his own sound from distant hill after 2 seconds. How far away is the person from the hill, if the speed of the sound is 330ms^-1.

PROBLEM No 3.1 Class X / SSC-ΙI丨Chapter # 3 (Find the time taken by the sunlight to reach the ground if the distance the sun and the earth is 1.5 × 108 Km. Velocity of the light is 3 × 108ms-1.)

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                                                                                                             Class X / SSC-ΙI丨Chapter # 3

PROBLEM No 3.1

                Find the time taken by the sunlight to reach the ground if the distance the sun and the earth is 1.5 × 10⁸ Km. Velocity of the light is 3 × 10⁸ms^-1.

PROBLEM No 4.8 Class X / SSC-ΙI丨Chapter # 4丨Problems ( A rectangular block of mass 4 kg rests on the top of a metal surface. The co-efficient of friction b/w the box is 0.2. What is the force parallel to the surface is needed to move the block.)

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PROBLEM No 4.8

                A rectangular block of mass 4 kg rests on the top of a metal surface. The co-efficient of friction b/w the box is 0.2. What is the force parallel to the surface is needed to move the block.

PROBLEM No 4.7 Class X / SSC-ΙI丨Chapter # 4丨Problems (Two bodies A and B are attached to the ends of a string which pass over a pulley so that they hang vertically. If the mass of the body B is 4 kg, find mass of body A which moves up with an acceleration of 0.5 ms-1.)

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Class X / SSC-ΙI丨Chapter # 4丨Problems

PROBLEM No 4.7

                Two bodies A and B are attached to the ends of a string which pass over a pulley so that they hang vertically. If the mass of the body B is 4 kg, find mass of body A which moves up with an acceleration of 0.5 ms^-1.

PROBLEM No 4.6 Class X / SSC-ΙI丨Chapter # 4丨Problems (An empty truck weights 4000 N. Its engine can produce a maximum acceleration of 1 ms-2. If the truck is loaded with 2000 N, find the maximum acceleration the engine can produce.)

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Class X / SSC-ΙI丨Chapter # 4丨Problems

PROBLEM No 4.6

                An empty truck weights 4000 N. Its engine can produce a maximum acceleration of 1 ms^-2. If the truck is loaded with 2000 N, find the maximum acceleration the engine can produce.

PROBLEM No 4.5 Class X / SSC-ΙI丨Chapter # 4丨Problems (A gun of mass 20 kg fires a bullet of mass 50 g with a velocity of 200 ms-1. Calculate the velocity of the recoil of the gun.)

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Class X / SSC-ΙI丨Chapter # 4丨Problems

PROBLEM No 4.5

                A gun of mass 20 kg fires a bullet of mass 50 g with a velocity of 200 ms^-1. Calculate the velocity of the recoil of the gun.

PROBLEM No 4.4 Class X / SSC-ΙI丨Chapter # 4丨Problems (A force of 120 N acts on a stationary body for 4 sec and the body acquires a velocity of 36 ms-1. Calculate the mass of the body.)

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Class X / SSC-ΙI丨Chapter # 4丨Problems

PROBLEM No 4.4

                A force of 120 N acts on a stationary body for 4 sec and the body acquires a velocity of 36 ms^-1. Calculate the mass of the body.

PROBLEM No 4.3 Class X / SSC-ΙI丨Chapter # 4丨Problems A bullet of mass 50 g travelling with a speed of 15ms‑1 penetrates into a bag of sand and is uniformly brought to rest in 0.05 s. Find: (a)How far will the bullet will the penetrates into the bag of sand. (b) The average force exerted by the sand.

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Class X / SSC-ΙI丨Chapter # 4丨Problems

PROBLEM No 4.3

                A bullet of mass 50 g travelling with a speed of 15ms‑¹ penetrates into a bag of sand and is uniformly brought to rest in 0.05 s. Find:        (a)How far will the bullet will the penetrates into the bag of sand.

(b)  The average force exerted by the sand. 

PROBLEM No 4.2 A car of mass 1000 kg travelling at 72km h-1 is uniformly brought to rest over the distance of 40 m. Find (a) The average acceleration. (b) The average breaking force.

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Class X / SSC-ΙI丨Chapter # 4丨Problems

PROBLEM No 4.2

                A car of mass 1000 kg travelling at 72km h^-1 is uniformly brought to rest over the distance of 40 m. Find

(a)  The average acceleration.   (b)  The average breaking force.

PROBLEM No 4.1 Determine the acceleration of car of mass of 900 kg, when a net force of 2700 N acts on it.

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Class X / SSC-ΙI丨Chapter # 4丨Problems

 PROBLEM No 4.1 

Determine the acceleration of car of mass of 900 kg, when a net force of 2700 N acts on it.