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Suppose that a block is pulled at a constant velocity with a constant force in the presence of sliding friction. Answer the questions carefully.
(a) What is the net force on the block while it is moving at a constant velocity from point a to point b? Explain how you arrived at your answer.
(b) What is the net work done on the block while it is moving from point a to point b? Explain how you arrived at your answer.
(c) What is the change in the kinetic energy of the block as it moves from point a to point b at a constant velocity? Explain how you arrived at your answer.
(d) Does the Net Work-Kinetic Energy Theorem hold for this situation where friction is present?
A tuning fork of unknown frequency is noted to be higher than one marked 512 hz and lower than one marked 1000 hz. You discover resonance points at .11 m and .53 m. Using 347 m/s for speed of sound what is the frequency of the new fork.
Using Newton's laws find the normal force on the object. Determine the force of kinetic friction on the object
A spacecraft approaching the earth launches an exploration vehicle. After the launch, What is the speed of the exploration vehicle relative to the spaceship
A mass of 9.30 kg is suspended from a 1.45 m long string. It revolves in a horizontal circle, Calculate the angle between the string and the vertical
A simple circuit consists of a light bulb connected to the terminals of a battery. Determine the resistance and power of the bulb
The Earth has mass ME and average radius RE. Find an expression for the moment of inertia IE of the Earth on its axis in terms of the given parameters
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.875 rad/s. You, with a mass of 69.5 kg, Calculate the total angular momentum of the system
A car accelerates uniformly from rest and covers a distance of 71 m in 5.6 s. If the diameter of a tire is 42 cm, 1.) Find the angular acceleration of the wheel.
The International Space Station is orbiting the Earth at an altitude of about 340 Km above the Earth's surface, find the size of the tangential velocity of the Space Station
A horizontal force of 12 N pushes a .5 kg book against a vertical wall. The book is initally at rest. compute the magnitude of the frictional force
A 85 kg window cleaner uses a 14 kg ladder that is 5.9 m long. He places one end on the ground 3.4 m from a wall, find the angle (relative to the horizontal) of that force on the ladder
One end of a horizontal rope is attached to a prong of an electrically driven tuning fork that vibrates at a frequency 125Hz, What is the speed of a transverse wave on the rope
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