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An automobile has a mass of 1500 kg and us moving at a speed of 100 km/h.
a. What is its momentum?
b. What average force will stop it in 5.0 sec?
c. What average force will stop it in 100 sec?
Mary throws a ball to Suzy, who is standing 25 meters away. Suzy catches the ball from the same height at which it was thrown. calculate initial vertical velocity and Horizontal velocity
A skier is accelerating down a 30.0 degree hill at 1.8 m/s^2. How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if elevation change is 325 m.
A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6m/s in 2 seconds. how much force was exerted on puck? how much on the stick.
An object with mass m1 = 5.90 kg, rests on a frictionless horizontal table and is connected to a cable that passes over a pulley, Find the magnitude of the acceleration of each object
Suppose that a 1800 kg car passes over a bump in a roadway that follows the arc of a circle of radius 20.8 m, What force does the road exert on the car as the car passes the highest point of the bump if the car travels at 40.0 km/h
If you now place a pencil under the edge of the mirror nearer the wall, tilting it upward by 5.0, how much higher on the wall is the spot?
A flywheel rotates with an angular speed of 22 rev/s . As it is brought to rest with a constant acceleration, it turns 46 rev. What is the magnitude of the angular acceleration
A typical home circuit is diagrammed in figure 23-16. Note that the lead lines to the kitchen lamp each have a very low resistance of 0.25 Ω. The lamp has a resistance of 240.0Ω. Though the circuit is a parallel circuit, the lead lines are in series ..
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. What is the speed of a satellite in a geosynchronous orbit
You stand on the shore of a small river that measure 10 meters across. You take your cat and throw it into the middle of the stream. How long did it take the cat to reach you
A singly ionized Nickel atom has an overall charge of 1.602 x 10^-19C and a mass m = 9.80 x 10^-26 g. what will the radius of the curved path that the Nickel atom has within the deflection chamber be
The depth of water behind the Hoover Dam in Nevada is 220 m. What is the water pressure at base of this dam? (Neglect the pressure due to the atmosphere.)
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