Physics-
General
Easy
Question
A long plank P of the mass 5 kg is placed on a smooth floor. On P is placed a block Q of mass 2 kg. The coefficient of friction between P and Q is 0.5. If a horizontal force 15N is applied to Q, as shown, and you may take g as 10N/kg.
- The reaction force on Q due to P is 10N
- The acceleration of Q relative to P is 2.5 m/s2
- The acceleration of P relative to the Floor is 2.0 m/s2
- The acceleration of centre of mass of P + Q system relative to the floor is (15/7) m/s2
The correct answer is: The acceleration of P relative to the Floor is 2.0 m/s2
Related Questions to study
physics-
An iron sphere weighing 10 N rests in a V shaped smooth trough whose sides form an angle of 60° as shown in the figure. Then the reaction forces are
An iron sphere weighing 10 N rests in a V shaped smooth trough whose sides form an angle of 60° as shown in the figure. Then the reaction forces are
physics-General
physics-
Adjoining figure shows a force of 40 N acting at 30° to the horizontal on a body of mass 5 kg resting on a smooth horizontal surface. Assuming that the acceleration of free–fall is 10 ms–2, which of the following statements A, B, C, D, E is (are) correct?
1) The horizontal force acting on the body is 20 N
2) The weight of the 5 kg mass acts vertically downwards
3) The net vertical force acting on the body is 30 N
Adjoining figure shows a force of 40 N acting at 30° to the horizontal on a body of mass 5 kg resting on a smooth horizontal surface. Assuming that the acceleration of free–fall is 10 ms–2, which of the following statements A, B, C, D, E is (are) correct?
1) The horizontal force acting on the body is 20 N
2) The weight of the 5 kg mass acts vertically downwards
3) The net vertical force acting on the body is 30 N
physics-General
physics-
To paint the side of a building, painter normally hoists himself up by pulling on the rope A as in figure. The painter and platform together weigh 200N. The rope B can withstand 300N. Then
To paint the side of a building, painter normally hoists himself up by pulling on the rope A as in figure. The painter and platform together weigh 200N. The rope B can withstand 300N. Then
physics-General
physics-
A student calculates the acceleration of m1 in figure shown as 
. Which assumption is not required to do this calculation?
A student calculates the acceleration of m1 in figure shown as . Which assumption is not required to do this calculation?
physics-General
physics-
Consider a sphere of mass ‘m’ radius ‘R’ doing pure rolling motion on a rough surface having velocity v0 
as shown in the Figure. It makes an elastic impact with the smooth wall and moves back and starts pure rolling after some time again
Consider a sphere of mass ‘m’ radius ‘R’ doing pure rolling motion on a rough surface having velocity v0 as shown in the Figure. It makes an elastic impact with the smooth wall and moves back and starts pure rolling after some time again
physics-General
physics-
A ring of mass M and radius R sliding with a velocity v0 suddenly enters into rough surface where the coefficient of friction is 
, as shown in figure. Choose the correct alternative(s)
A ring of mass M and radius R sliding with a velocity v0 suddenly enters into rough surface where the coefficient of friction is , as shown in figure. Choose the correct alternative(s)
physics-General
physics-
A ring of mass M and radius R sliding with a velocity v0 suddenly enters into rough surface where the coefficient of friction is , as shown in figure. Choose the correct statement(s)
A ring of mass M and radius R sliding with a velocity v0 suddenly enters into rough surface where the coefficient of friction is , as shown in figure. Choose the correct statement(s)
physics-General
physics-
A ring of mass M and radius R sliding with a velocity v0 suddenly enters into rough surface where the coefficient of friction is , as shown in figure. Choose the correct statement(s)
A ring of mass M and radius R sliding with a velocity v0 suddenly enters into rough surface where the coefficient of friction is , as shown in figure. Choose the correct statement(s)
physics-General
physics-
A ring of mass M and radius R sliding with a velocity v0 suddenly enters rough surface where the coefficient of friction is , as shown in figure. Choose the correct statement(s)
A ring of mass M and radius R sliding with a velocity v0 suddenly enters rough surface where the coefficient of friction is , as shown in figure. Choose the correct statement(s)
physics-General
physics-
In the figure shown, the plank is being pulled to the right with a constant speed v. If the cylinder does not slip then
In the figure shown, the plank is being pulled to the right with a constant speed v. If the cylinder does not slip then
physics-General
physics-
A hollow sphere of radius R and mass m is fully filled with water of mass m. It is rolled down a horizontal plane such that its centre of mass moves with a velocity v. If it purely rolls
A hollow sphere of radius R and mass m is fully filled with water of mass m. It is rolled down a horizontal plane such that its centre of mass moves with a velocity v. If it purely rolls
physics-General
physics-
A plank with a uniform sphere placed on it, rests on a smooth horizontal plane. Plank is pulled to right by a constant force F. If the sphere does not slip over the plank
A plank with a uniform sphere placed on it, rests on a smooth horizontal plane. Plank is pulled to right by a constant force F. If the sphere does not slip over the plank
physics-General
physics-
A disc of circumference s is at rest at a point A on a horizontal surface when a constant horizontal force begins to act on its centre. Between A and B there is sufficient friction to prevent slipping, and the surface is smooth to the right of B. AB = s. The disc moves from A to B in time T. To the right of B
A disc of circumference s is at rest at a point A on a horizontal surface when a constant horizontal force begins to act on its centre. Between A and B there is sufficient friction to prevent slipping, and the surface is smooth to the right of B. AB = s. The disc moves from A to B in time T. To the right of B
physics-General
physics-
Four point masses are fastened to the corners of a frame of negligible mass lying in the xy plane. Let w be the angular speed of rotation. Then
Four point masses are fastened to the corners of a frame of negligible mass lying in the xy plane. Let w be the angular speed of rotation. Then
physics-General
physics-
A body is in equilibrium under the influence of a number of forces. Each force has a different line of action. The minimum number of forces required is
A body is in equilibrium under the influence of a number of forces. Each force has a different line of action. The minimum number of forces required is
physics-General
