A crowbar of 2m length is pivoted about 40cm from its tip and load of 800N is lifted by applying an effort at the other end. Calculate effort, M.A.,V. R.,efficiency.

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is