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Q. Explain how does a magnitude of the electrical force between a pair of charged particles change when they are brought to half their original distance of seperation?
What tension in Newtons should a 50cm length of string support in order to whirl an attached 2000g stone in a circular path at 5 m/s.
What are speed and direction of the ball after the collision
What is the work completed by the force of gravity.
What minimum force must be applied to the crate perpendicular to the incline to prevent crate from sliding down the incline.
what is the potential difference between the plates. A particular freely falling object requires 1.85 s to travel the last 31.0 m before it hits the ground. From what height above the ground did it fall.
When a certain spring is stretched by an amount x, it produces a restoring force of F(x) = ax=bx^2, where a and b are constants. How much work is done through an external force in stretching the spring by an amount D from its equilibrium length.
A uniform plank of length 5.0 m and weight 211 N rests horizontally on two supports, with d = 1.17 m of the plank hanging over the right support. To what distance, x, could a person who weighs 412 N walk on the overhanging part of the plank before..
A 56 kg astronaut floating at rest in space outside a space capsule throws his 0.50kg hammer such that it moves with the speed of 14.00 m/s relative to the capsule. What happens to the astronaut? What is the astronaut's speed.
Two identical positive charges exert a repulsive force of 6.2 x10-9 N when separated by a distance of 3.6 x10-10 m. compute the charge of each.
Two equal length strips of aluminum and steel are heated. Which expands more? How much more - that is, by what factor is one expansion greater than the other?
An uncharged capacitor is connected to a 55 V battery until it is fully charged, after which it is disconnected from the battery. A slab of paraffin is then inserted between the plates.
An object, mass 2.96kg, moves in a horizontal circle with a radius of 3.8m. The object has the intial velocity of 32.6 m s-1. If the kinetic coefficient of friction between the object and the surface is 0.31, then number of completed revolutions (..
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