Physics Answers

An astronaut on a planet with no atmosphere drops a feather into a 5.90m deep crater and records that the feather falls freely for 1.64s.

What is the magnitude of free-fall acceleration on the planet?

With what speed does the feather strike the bottom of the crater?

A large gun fires a shell with a muzzle velocity of 400m/sec. What is the renge of the gun when it is elevated at an angle of: 30? and 50?

How far will a jumper go if he accelerates to 11.0 m/sec and jumps at an angle of 30

A mass m is subject to a resistive force –bv and a driving force given by F=F_0 cos⁡(ω_d t). No restoring forces act on this system.

Develop the differential equation of motion.

A SPACECRAFT ORBITING THE EARTH TRAVELS 59 400KM IN 1.5H WHAT IS THE AVERAGE SPEED OF THE SPACECRAFT IN M/S AND KM/H

Explain how viscosity is related to the flow and attraction between atoms in a liquid

Below is a lift at Gugulethu mall depicted. The lift travels from the ground floor to the
eighth floor as shown. You have made studies during its installation and found out that
the cable has a mass of 6.3 kg/m. The lift cage has a mass of 750 kg and there are
three people in the lift, two weighing 75 kg each. The third person is you. Answer the
following questions without neglecting the weight of the third person in the lift

A mass m is subject to a resistive force –bv and a driving force given by F=F_0 cos⁡(ω_d t). No restoring forces act on this system.
a. Develop the differential equation of motion.
b. By assuming a steady-state solution of the form x(t)=A cos⁡(ω_s t-δ) and using the complex exponential method, determine the amplitude A and phase lag δ for this system

Write down the ground state configuration for protons and neutrons and determine the spin and parity of 17O8(oxygen) nucleus using the shell model.