Give examples where (a) the velocity of a particle is zero but its acceleration is not zero, (b) the velocity is in opposite direction to the acceleration , (c) the velocity is perpendicular to the acceleration.
Approved Tutor Answer15 Years agoa)let particle velocity is given by v=3-t then a=dv/dt=3
at t=3s ,v=0 but a is 3
b)at t=4s
v=-ve (backward)
a=3(forward)
c)in this case we can take example of uniform circular motion in which a particleis moving with a constant velocity in a circle of radius r and the so there exists a
centripital accleration directed towards the center of circle or perpendicular to velocity.
(a) suppose a body thrown vertically up and at the maximum point, the velocity becomes 0 but the acceleration is downward with an acceleration g.
(b) in the same case, when the body is moving upward, the velocity is in one direction but the acceleration is towards down (g)
Three identical balls are placed on a frictionless
horizontal surface touching each other. They stick to
each other because of adhesive. Another ball of same
radius and mass m is placed over the void created by
the three balls. Find the forces applied by the balls
kept on the floor to each other if the system remains
in equilibrium.
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A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.
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Last Activity: 10 Months ago
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