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A man standing on very slick ice fires a rifle horizontally. The mass of the man together with the rifle is 70{\rm kg} , and the mass of the bullet is 10{\rm g} If the bullet leaves the muzzle at a speed of 500{\rm m/s} , what is the final speed of the man?
A magnetic field of 3 Tesla is oriented into the page. A 10 cm long conducting bar is pulled to the right at a constant speed of 3.4 m/s. What is the power supplied by the person pulling the bar
Grace is playing with her dolls and decides to give them a ride on a merry-go-round. If the doll is 13 cm from the center of the spinning turntable platform, how fast (in m/s) is the doll moving
Two people carry a heavy electric motor by placing it on a light board 1.55 m long. One person lifts at one end with a force of 390 N, What is the weight of the motor
When a 58 g tennis ball is served it accelerates from rest to a constant speed of 42 m/s the impact with the racket gives the ball a constant acceleration over a distance of 37 cm illustrate what is the magnitude of the net force acting on the ball..
A spaceship leaves earth (Event A), travels to pluto (which is 5.0 h away at the time), and then returns (Event B) exactly 11.0 h later. estimate the time measured between events A and B by the ship's clock
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. How many revolutions per minute is the sample making
a pendulum with a pendulum length of 1.25 m undergoing SHM of mass 250g just released from an angel of 7 to the vertical. determine the period and frequency of the motion
A fully equipped astronaut has a mass of 140 kg. If the astronaut has a weight of 675 N standing on the surface of a planet, what is the acceleration due to gravity on this planet?
How much current is contained within the width of a thin ring concentric with the wire if the ring has the radial width of 12.0 µm and is at a radial distance of 1.2 mm.
A spacecraft has a nonrelativistic (or classical) momentum whose magnitude is 1.4×1014 kg·m/s. Find the relativistic momentum of the spacecraft
When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. Calculate the change in the combined kinetic energy of the two-car system during this collision
Find out the shear strain that results if a force of magnitude 5.00×105 is applied to the top square face of the plate, parallel to the side, and a force of equal magnitude is applied in the opposite direction to the bottom face of the plate as s..
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