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Q. Suppose you carry a bag of groceries weighing 127 N from your car to your kitchen, a distance of 57 m, without raising or lowering the bag.
(a) What is the work done by the force you exert on the bag?
(b) Would the work be different if your kitchen were in an upstairs apartment?
A handball of mass 0.10 kg, traveling horizontally at 25 m/s, strikes a wall and rebounds at 19m/s. What is the change in the momentum of the ball.
The block is acted upon by its weight w=200lb, a horizontal force Q=600 lb and pressure P exerted by the inclined plane. The resultant R of these forces is up and parallel to the incline there by sliding the block up it. Establish P and R.
A 0.174kg softball is pitched horizontally at 26m/s. the ball moves in the opposite direction at 38m/s after it is hit by the bat.
A car of mass 1800 travelling at 60.7 enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between the road and the car's tires. Use = 9.80 throughout the problem.
What is the speed of the center of mass
What is an average velocity of the train throughout run
An ice block is pushed horizontally on a frictionless surface with initial velocity v0. At some point, it comes to the nearly semicircular bump with a radius R=0.42m and the height h=0.33m above the ground.
Assume the charge on black hole is 5740 C. At what distance from it is the electric potential equal to 1100 V.
A dolphin in seawater at a temperature of 25 °C emits a sound wave directed toward the ocean floor 246 m below. How much time passes before it hears an echo? (The speed of sound in ocean water is 1533 m/s.)
Net average force using the concepts of Newton’s second law.
What travel time is required for the landing
A charge of -4 nC is at the origin and a second charge of 14 nC is at x = 3.00 m. Find out the magnitude and direction of the electric field halfway in between two charges.
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