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a student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 20m/s the stone travels 100 m horizntally and hits the beach.
A- how long after being released does the stone strike the beach below the cliff?
B- what is the height of the cliff?
C- what is the speed of impact when the stone lands?
D- What is the angel of the impact velocity below the horizontal?
An engine does 20000 J of work and rejects 6120 J of heat into a cold reservoir whose temperature is 285 K. What would be the smallest possible temperature of the hot reservoir.
A highway curve of radius 500 m is designed for traffic moving at a speed of 73 km/hr. What is the correct banking angle of the road.
An athlete at a gymnasium holds a 3.0kg steel ball in his hand. His arm is 70cm long and has a mass of 4.0kg. Calculate the magnitude of the torque about his shoulder if he holds his arm
A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.80{Hz}. Illustrate what is the mass of the fish, ignoring the mass of the spring.
A space craft is designed to be rotating column, in order to simulate artifical gravity. find angular frequency must be maintained to simulate surface gravity
What is the spring constant (k) of the bungee cord.At what time will the object be moving with a speed of 15 m/s.
Two 480g blocks of wood are 2.0 m apart on a frictionless table. A 9.0g bullet is fired at 440m/stoward the blocks. What is the speed of the second block after the bullet stops
Using energy considerations, compute the average force the beam exerts on the pile driver while the pile driver is brought to rest.
A circular loop of flexible iron wire has an initial circumference of 169cm but its circ. is decr. Find the magnitude of the emf induced in the loop after exactly time 5.00s has passed since the circumference of the loop started to decrease
Air is streaming horizontally past a small airplanes wings such that the speed is 50m/s over the top surface and 30 m/s past the bottom surface. the plane has a mass of 300 kg and a total wing area of 5 m^2(both wings).
Suppose you were performing the same experiment on this crate but were doing it on the moon instead, where the acceleration due to gravity is 1.62 m/s squared. What magnitude push would cause it to move? What will be its acceleration if you maintaine..
When a certain photoelectric material is illuminated with red light (?=715) and then blue light (?=400), calculate the work function of the material
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