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Q. A very small charged block with a mass of 2.05 g is placed on an insulated, frictionless plane inclined at an angle of 17.0° with respect to the horizontal. The block does not slide down the plane because of a 490 N/C uniform electric field that points parallel to the surface downward along the plane. What is the charge on the block?
Q. A car traveling 99km/h is 140m behind a truck traveling 72km/h. How long will it take the car to reach the truck?
A 5.20 g pop up toy is compressed 1.50 cm and pops up to the height of 50 cm the spring constant is 270 Nm. What is the loss of energy.
An electron librated from a hot filament cathode is attracted by an anode with a potential of 1200V positive with respect to the filament. Compute the speed of the electron when it strikes anode.
A projectile is launched from the top of a cliff above level ground. At launch the projectile is 35 meters above the base of the cliff and has the velocity of 50 meters per second at an angle 37° with horizontal. Air resistance is negligible.
A 425 kg bear grasping a vertical tree slides down at constant velocity. What is friction force that acts on the bear.
What is the coefficient of kinetic friction
A block of iron has the dimensions of 3.00 cm x 3.00 cm x 3.00 cm. It has a mass of 213 g. When placed in water, the block sinks. What volume of water did it displace.
Tim and Rick both can run at speed and walk at speed, with. They set off together on a journey of distance. Rick walks half of the distance and runs the other half. Tim walks half of the time and runs the other half.
What should the charge (sign and magnitude) of a particle of mass 1.47g be for it to remain stationary when placed in a downward-directed electric field of magnitude 660 N/C.
A 10 kg runaway grocery cart runs into a spring with spring constant 240N/m and compresses it by 65cm. What was the speed of the cart just before it hit the spring.
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An 82 kg man drops from rest on the diving board 3 m above the surface of the water and comes to rest 0.55 s after reaching the water. What force does the water exert on him.
what speed will the dart leave the gun.
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