Physics-
General
Easy
Question
A man balances himself in a horizontal position by pushing his hands and feet against two parallel walls. His centre of mass lies midway between the walls. The coefficients of friction at the walls are equal. Which of the following is not correct?
- He exerts equal forces on walls
- He exerts only horizontal forces on the walls
- The forces of friction at the walls are equal
- The forces exerted by the walls on him are not horizontal
The correct answer is: He exerts only horizontal forces on the walls
Related Questions to study
physics-
The coefficient of friction between 4kg and 5 kg blocks is 0.2 and between 5kg block and ground is 0.1 respectively. Choose the correct statements
The coefficient of friction between 4kg and 5 kg blocks is 0.2 and between 5kg block and ground is 0.1 respectively. Choose the correct statements
physics-General
physics-
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.
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.
physics-General
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