Numerical Problems
32. A body of mass 500 g is accelerated at 2 m/s. Find the magnitude of the accelerating force. [Ans. 1 N]
33. Find the acceleration produced when a force of 30 N acts on a body of 300 g [Ans. 100 m/s']
34. Calculate the acceleration produced in the following cases:
(a) A force of 24 N acting on a body of mass 12 kg.
(b)A force of 24 N acting on a body of mass 6 kg.
(c) A force of 48 N acting on a body of mass 12 kg.
What can you conclude from here?
[Ans.(a) 2 m/s, (b) 4 m/s, (c) 4 m/s?]
35. A force of 0.6 N acting on a body increases its velocity from 5 m/s to 6 m/s in 2 s. Calculate the mass of the body. [Ans. 1.2 kg)
36. An object undergoes an acceleration of 8 m/s2 starting from rest. Find the distance travelled by it in one second. [Ans. 4 m)
37. A 1000 kg vehicle moving with a speed of 10 m/s is brought to rest in a distance of 50 by the application of brakes. Calculate (a) its acceleration, (b) the force acting on the vehicle.
[Ans. - 1 m/s, (b) - 1000 N]
38. A ball weighing 500 g is thrown vertically upward with a speed of 10 m/s. What will be its momentum (a) initially (b) at the highest point? [Ans.(a) = 5 kg m/s, (b) zero]
39. Find the magnitude of the net force on a 20 kg mass if it accelerates uniformly from 2.5 m/s to 5.8 m/s in 3 s.
[Ans. 22 N]
40. (a) A man pushes a box of mass 50 kg with a force of 80 N. What will be the acceleration of the box due to this force?
(b) What would be the acceleration if the mass is halved?
[Ans.(a) 1.6 m/s, (b) Doubled]
41. A car 'A' of mass 1500 kg, travelling at 25 m/s collides with another car 'B' of mass 1000 kg travelling at 15 m/s in the same direction. After collision, the velocity of car A becomes 20 m/s. Calculate the velocity of car B after collision. [Ans. 22.5 m/s]
32. A body of mass 500 g is accelerated at 2 m/s. Find the magnitude of the accelerating force. [Ans. 1 N]
33. Find the acceleration produced when a force of 30 N acts on a body of 300 g [Ans. 100 m/s']
34. Calculate the acceleration produced in the following cases:
(a) A force of 24 N acting on a body of mass 12 kg.
(b)A force of 24 N acting on a body of mass 6 kg.
(c) A force of 48 N acting on a body of mass 12 kg.
What can you conclude from here?
[Ans.(a) 2 m/s, (b) 4 m/s, (c) 4 m/s?]
35. A force of 0.6 N acting on a body increases its velocity from 5 m/s to 6 m/s in 2 s. Calculate the mass of the body. [Ans. 1.2 kg)
36. An object undergoes an acceleration of 8 m/s2 starting from rest. Find the distance travelled by it in one second. [Ans. 4 m)
37. A 1000 kg vehicle moving with a speed of 10 m/s is brought to rest in a distance of 50 by the application of brakes. Calculate (a) its acceleration, (b) the force acting on the vehicle.
[Ans. - 1 m/s, (b) - 1000 N]
38. A ball weighing 500 g is thrown vertically upward with a speed of 10 m/s. What will be its momentum (a) initially (b) at the highest point? [Ans.(a) = 5 kg m/s, (b) zero]
39. Find the magnitude of the net force on a 20 kg mass if it accelerates uniformly from 2.5 m/s to 5.8 m/s in 3 s.
[Ans. 22 N]
40. (a) A man pushes a box of mass 50 kg with a force of 80 N. What will be the acceleration of the box due to this force?
(b) What would be the acceleration if the mass is halved?
[Ans.(a) 1.6 m/s, (b) Doubled]
41. A car 'A' of mass 1500 kg, travelling at 25 m/s collides with another car 'B' of mass 1000 kg travelling at 15 m/s in the same direction. After collision, the velocity of car A becomes 20 m/s. Calculate the velocity of car B after collision. [Ans. 22.5 m/s]
