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A 46-kg skater is standing still in front of a wall. By pushing against the wall she propels her-self backward with a velocity of -1.2m/s. Her hands are in contact with the wall for 0.80 s. Ignore wind resistance and friction. Determine direction and magnitude of the average force she exerts on the wall.
A box sits at the top of an unfolding ramp. As the ramp isgradually tilted down from horizontal, the box will eventuallystart to slide down the ramp, the ramp then stops further tiltingand is held at this angle.
white light is sent downward onto a horizontal thin film that is sandwiched between two materials. the indexes of
A ball of mass m traveling horizontally with velocity v strikes a massive vertical wall and rebounds back along its original direction with no change in speed. What is the magnitude of the impulse delivered by the wall to the ball?
question1a 20g rifle bullet travelling 230 ms buries itself in a 3.9 kg pendulum hanging on a 2.7 m long string that
The work completed by friction on the rock when it moves from point to point at the bottom of the bowl has magnitude 0.22. Just as the rock reaches point, what is the normal force on it because of the bottom of the bowl .
PRACTICE IT Use the worked example above to help you solve this problem. A proton is released from rest at x = ?2.00 cm in a constant electric field with magnitude 1.50 103 N/C pointing in the positive x-direction. (a) Assuming an initial speed of..
hookes law describes a certain light spring of unstretched length 33.0 cm. when one end is attached to the top of a
A 4.50 g} bullet is fired horizontally into a 1.10 kg} wooden block resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.200. The bullet remains embedded in the block, which is observed to slide 0.200..
three forces act on a mass causing it to move from rest to the right a distance 4.94 m. if the forces at 48.41 at 0
a a cardinal richmondena cardinalis of mass 4.00times10-2 kg and a baseball of mass 0.140 kg have the same kinetic
Suppose that you pull on the rope OA shown in the figure, exerting a 50 N force F at O. What are the force vectors
Hydrogen under p = 5 atmospheres and T = 20 C is warmed isobarically until its volume increases from 1 to 2 liters. Calculate the absorbed heat.
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