Laws Of Motion
A marble block of mass 2 kg lying on ice when given a velocity of 6m/s is stopped by friction in 10s. Then the coefficient of friction is
The force required to just move a body up the inclined plane is double the force required to just prevent the body from sliding down the plane. The coefficient of friction is μ. If θ is the angle of inclination of the plane than tanθ is equal to
An explosion blows a rock into three parts. Two parts go off at right angles to each other . These two are 1kg first part moving with a velocity of 12ms−1and2kg second part moving with a velocity of 8ms−1. If the third part flies off with a velocity of 4ms−1. Its mass would be
Two bodies A and B of mass 5kg and 10kg, in contact with each other rest on a table against a rigid wall (see figure). The coefficient of friction between the bodies and the table is 0.15. A force of 200N is applied horizontally to A. What are (a) the reaction of the vertical wall. (b) the action-reaction forces between A and B? What happens when the wall is removed? Does the answer to (b) change, when the bodies are in motion? Ignore the difference between μs and μk.
An aircraft executes a horizontal loop at a speed of 720 km/h with its wings banked at 150. What is the radius of the loop?
A block of mass m is at rest on wedge as shown in figure. Let N be the normal reaction between two and f the force of friction, then choose the wrong option.