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A rock is thrown from 50.0-m-high cliff with an initial velocity of 70 m/s at an angle of 53.0 degrees above the horizontal. Find the velocity vector for when it hits the ground below.
A boy can throw a ball a maximum horizontal distance of40.0 m on a level field. How far can he throw the same ball vertically upwards
A 3-kg steel ball strikes a wall with a speed of 13-m/s at an angle of 60.0° with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for 0.20s, what is the average force exerted by the wall on the..
three forces act on a moving object. one force has a magnitude of66.5n and is directed due north. another has a
it is possible to generate electricity using small variations in the earths magnetic field but why havent we done it?
A 3.00 kg box is moving to the right with speed 10.0m/s on a horizontal, frictionless surface. At t= 0 a horizontal force is applied to the box. what distance does the box move from its position at t=0 before its speed is reduced to zero
Two blocks of mass m are suspended vertically as shown (one block by a spring, the other block to the first by a string), and initially motionless. An instant after the string is cut:
Far in space, where gravity is negligible, a 485kg rocket traveling at 95.0m/s fires its engines. It shows the thrust force as a function of time. The mass lost by the rocket during these 30 s is negligible.
A compound microscope has objective and eyepiece focal lengths of 6.1mm and 1.9 cm , respectively. what is the magnification of the instrument
a diffraction grating is illuminated simultaneously with red light of wavelength 660 nm and light of an unknown
A box of mass 86.0 kg is connected to a second box with a mass of 30.0 kg. find the magnitude of the tension in the string between the two boxes
A coil of wire, initially carrying no current, has a current of 10 A established in .4 seconds. Determine the self-inductance of the coil
A car is driving directly north on the freeway at a speed of 118 km/h and a truck is leaving the freeway driving 89 km/h in a direction that is 39° west of north
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