Forces and Torque in Equilibrium

The video tutorial explains a physics problem involving a man standing on a lightboard supported at both ends. The board is considered weightless, and the man's weight is given as 720 Newtons. The tutorial covers the steps to calculate the forces exerted by the supports using concepts of torque and equilibrium. It involves drawing the setup, identifying forces, calculating torques, and applying both rotational and translational equilibrium to find the unknown forces.

What is the weight of the man standing on the lightboard?

• 1000 Newtons

• 200 Newtons

• 500 Newtons

• 720 Newtons

What is the length of the lightboard?

• 2 meters

• 1 meter

• 4 meters

• 3 meters

Which force is exerted by the man on the board?

• Frictional force

• Gravitational force

• Normal force

• Tension force

What is the role of the axis of rotation in this problem?

• It helps in calculating the torque produced by the forces.

• It determines the direction of the forces.

• It is used to measure the length of the board.

• It is irrelevant to the problem.

How is the torque produced by a force calculated?

• Force multiplied by distance from the axis of rotation

• Force divided by distance from the axis of rotation

• Force subtracted from distance from the axis of rotation

• Force added to distance from the axis of rotation

What is the force exerted by the first support?

• 540 Newtons

• 720 Newtons

• 1080 Newtons

• 180 Newtons

What condition is used to find the force exerted by the first support?

• Chemical equilibrium

• Thermal equilibrium

• Rotational equilibrium

• Translational equilibrium

What is the force exerted by the second support?

• 180 Newtons

• 540 Newtons

• 720 Newtons

• 1080 Newtons

Which condition is applied to find the force exerted by the second support?

• Thermal equilibrium

• Translational equilibrium

• Chemical equilibrium

• Rotational equilibrium

What is the total force acting on the board in the vertical direction?

• Zero, due to equilibrium

• 720 Newtons upward

• 720 Newtons downward

• 1080 Newtons upward