Classical Mechanics Answers

A 750 N athlete is doing a push-up exercise by putting his palms and toes on the floor. The athlete’s center of mass is 15 cm from his palms. The horizontal distance between his toes and palms is 120 cm. Assume the posture of the athlete as a rigid body,

(a) sketch a free body diagram of the athlete.

(b) calculate the force acting on each of his palms.

A flywheel of moment inertia 95 kgm^2 rotates about its axis with an angular velocity 60 rad/s. Coaxial with the flywheel is a gear-wheel of moment inertia 5.0 kgm^2, initially stationary. The two wheels are then joined together.

Calculate the angular velocity of both wheels together after they have been joined.

A flywheel of moment inertia 95 kg m2 rotates about its axis with an angular velocity 60 rad/s. Coaxial with the flywheel is a gear-wheel of moment inertia 5.0 kgm2, initially stationary. The two wheels are then joined together.

Calculate the angular velocity of both wheels together after they have been joined.

A 5.00-kg box slides 3.00 m across the floor before coming to rest. What is the coefficient of kinetic friction between the floor and the box if the box had an initial speed of 3.00 m/s?

Describe the type of spring "constant" needed to produce a constant restoring force like curve (a) in fig. 7-1.

A dog chases a cat across the 15m yard before the cat climbs a 4m tree. What is the finalndisplacement lf the cat?