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प्रश्न
Define force.
उत्तर
Forces are push or pull by an animate or inanimate agency.
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संबंधित प्रश्न
Give one example in the case where Force is at a distance.
Complete the following
1 N = ..........dyne.
Which of the following is not the force at a distance:
(a) electrostatic force
(b) gravitational force
(c) frictional force.
(d) magnetic force.
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
A body of mass 1 kg is thrown vertically up with an initial speed of 5 m s-1. What is the magnitude and direction of force due to gravity acting on the body when it is at its highest point? Take G = 9.8 n kg-1
A lead bullet of mass 20g, travelling with a velocity of 350 ms-1, comes to rest after penetrating 40 cm in a still target. Find:
1) the resistive force offered by the target and
2) the retardation caused by it
A body is acted upon by two forces of magnitude F, but in opposite directions. State the effect of the force if the two forces act at two different points of the body at a separation r.
Assertion: Force is defined as a push or pulls acting on a body.
Reason: CGS unit of force is the newton.
In ‘tug of war’ when two teams pull equally hard, then what happens?
The trees are greenish. They are greenish at the tip too. How does the water rise upward in a tree or plant against the force of gravity?
