Mechanics | Relativity Answers

how much does a 110kg person weigh on earth

prove that 'projectile motion is parabola'.

An object was launched with a velocity of 20 ms−1 at an angle of 45° to the vertical. At the
top of its trajectory the object broke into two equal pieces. One piece fell vertically
downwards. Where would the other piece fall? (Take g = 10 ms−2)

A motorcyclle stunt driver zooms off the end of a cliff at a speed of 30 meters per second. If he lands after 0.75 seconds, what is the height of the cliff?
What is the solution to this problem?

A wheel rotates with a constant angular acceleration of 3.50 rad/s². If the angular speed of the wheel is 2.00rad/s at t1=0,
(a) through what angle does the wheel rotate in 2.00 s?
(b) what is the angular speed at t = 2.00 s?

A grinding wheel starts from rest and has a constant angular acceleration of 5 rad/sec². At t = 6 seconds, find the centripetal and tangential accelerations of a point 75 mm from the axis. Determine the angular speed at 6 seconds, and the angle the wheel has turned through.

A solid sphere with a radius of 75 mm rolls (without slipping) down an inclined plane that is 5 m long. What is the angular velocity of the sphere at the bottom of the plane if it requires 10 seconds for it to reach the bottom? What is the angle of the plane?

An electric motor operates at 1800rpm. Find its angular speed in radians/seconds. What is the linear speed of a point 55mm from the axis of rotation? What is its centripetal acceleration?

The center of mass of a pitched baseball (3.80-cm radius) moves at 38.0 m/s. The ball spins about an axis through its center of mass with an angular speed of 125 rad/s. Calculate the ratio of the rotational energy to the translational kinetic energy. Treat the ball as a uniform sphere.

What is the moment of inertia for a 0.15-Kg billiard ball that has a radius of 0.1m?