Advertisements
Advertisements
Question
The adjacent diagram shows a heavy roller, with its axle at O, which is to be raised on a pavement XY. If there is friction between the roller and pavement, show by an arrow on the diagram the point of application and the direction of force to be applied. If pivoted at O, now will it go up?
Advertisements
Solution
The force should be applied at the topmost point of the roller. The direction of the force should be perpendicular to the axle O and upward at an angle, to generate torque. If the roller is pivoted at O, it will not go up because the applied force at O does not generate enough torque to lift the roller against gravity and friction.
APPEARS IN
RELATED QUESTIONS
A ball is hanging by a thread from the ceiling of the roof. Draw a neat labelled diagram showing the forces acting on the ball and the string
How can you feel a force of 1 N?
Complete the following:
Force = mass x ............
Which of the following is not the force at a distance?
Newton's second law of motion applicable in all condition is:
(a) `F = (Δp)/(Δt)`
(b) F = ma
(c) `F = M (Δv)/(Δt)`
(d) all three
Why is it easier to open a door by applying the force at the free end of it?
How do you define force? What are the forces acting on a man standing in a lift? If the lift moves down with an acceleration of 2 ms−2, what is the net force on the man if his mass is 50 kg?
If we apply force against the direction of motion of the body, then the body will
One kilogram-force equals to
Two friends on roller-skates are standing 5 m apart facing each other. One of them throws a ball of 2 kg towards the other, who catches it, How will this activity affect the position of the two? Explain your answer.
