Advertisements
Advertisements
Question
A brass ball is hanging from a stiff cotton thread. Draw a neat labeled diagram showing the forces acting on the brass ball and cotton thread
Solution
Forces acting on the brass ball and thread:
Tension acts on the thread in the upward direction, while weight mg of the ball acts downwards
APPEARS IN
RELATED QUESTIONS
A potter turns his wheel by applying a force through the stick near the rim of wheel.
Find the moment of force of 20 N about an axis of rotation at distance 0.5 m from the force.
State one way to obtain greater moment of a given force about a given axis of rotation.
State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?.
State Newton's first law of motion. Why is it called the law of inertia?
A wheel of diameter 2 m is shown in the figure with the axle at O. A force F = 2 N is applied at B in the direction shown in the figure. Calculate the moment of force about
- the centre O, and
- the point A.
A uniform metre rule of weight 10gf is pivoted at its 0 mark.
What moment of force depresses the rule?
Classify the following amongst contact and non-contact forces.
Frictional force
One joule is the amount of work done when a force of ......... moves a body through a distance of .......
A jack screw is provided with a long arm. Explain why?