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A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. Angling the mortar at an angle of ? = 66.0o (as shown), the crew fires the shell at a muzzle velocity of 241 feet per second. How far down the hill does the shell strike if the hill subtends an angle ? = 40.0o from the horizontal and How fast will the shell be traveling when it hits the ground?
A 100-m-long train accelerates uniformly from rest. If the front of the train passes a railway worker 166-m down the track at a speed of 21 m/s, what will be the speed of the last car as it passes the worker.
The loaded cab of an elevator has a mass of 3.0 x10^3 kg and moves 236 m up the shaft in 23s at constant speed. At what average speed does the force from the cable do work on the cab?
a projectile is fired with an initial velocity of 35 m/s at an angle of 30 degrees above horizontal of a 30 feet tall building. find (a) the max height of the projectile
What is the coefficient of kinetic friction
A student has built a 20-cm-long pinhole camera for a science fair project. She wants to photograph the Washington Monument, How far should she stand from the Washington Monument
A car (m = 1510 kg) is parked on a road that rises 18° above the horizontal. find the static frictional force that the ground exerts on the tire
A neon sign at the Catskellar requires 12,000 V to operate which is supplied by a transformer. If the primary draws 0.5 A, how much current is suppplied to the neon sign
An airplane is making a turn with a given radius in a circle. The lift force (given) is exerted perpendicular to the wings. What is the angle that the wings make with the horizontal
An elevator moves downward in a tall building at a constant speed of 4.35 m/s. Estimate the highest floor from which the bolt can fall
A bat emits chirping sounds of frequency 75 kHz while hunting for moths to eat. The bat flies east at 8 m/s. What is the frequency of the reflected sound detected by the bat
A 200 W speaker is playing at full power. The speaker is at the center of a 1 m radius spherical chamber. What is the total sound power that reaches the walls
A tall tree is growing across a river from you. You would like to know the distance between yourself and the tree, as well as its height, How far away is the tree
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