Classical Mechanics Answers

1. A particle of mass m moves according to x = x0 + at2, y = bt3, and z = ct. Verify that

                                      dLdt=r×F=τ                      

what is second law of motion and how it is related to gravity

1. An object whose mass is 0.05 kg is moving at a rate of 100 m/s. What force will be needed to stop the object in 0.14 s?

A continuous aligned fibre-reinforced composite is produced containing 36% aramid fibres of tensile strength 2.24GPa and the remainder of polycarbonate with tensile strength 99 MPa.  What is the longitudinal strength of the composite in MPa?

Show the energy consideration of harmonic oscillator at any time t and show that the energy decreases exponentially at a faster rate , E(t)= E₀e^-2βt  where E₀₌ 1/2KA²

Use the table of specific heat capacities to solve this problem. A bar of aluminum is heated to 90.0C and then placed into 10.0 L of water at 20.0 degrees * C . If the mixture cools to 22.4 degrees * C , what is the mass of the aluminum bar? 

a 55kg student climbs 5.6m up a rope gym class at a constant speed of 1.6 m/s . Determine the power exerted by the student with and without determining the time taken. 

A golf club with 70j of energy strikes a stationary golf ball with a mass of 48.0 g. The energy transfer is only 21% efficientCalculate the initial speed of the golf ball. 

5. Explain the law of conservation of mass affects the kinetic and gravitational potentia energy of a downhill skier at the top, middle and bottom of a hill. 

4. How much gravitational potential energy does a bird with a mass of 0.62 kg have it is 11.3 m in the air ?