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Your roommate is working on his bicycle and has the bike upside down. He spins the 70.0cm -diameter wheel, and you notice that a pebble stuck in the tread goes by three times every second. What is the speed and acceleration of the pebble?
A 4 kg fish swimming 3 m/s swallows an absent minded 2 kg fish at rest. What is the speed of the large fish instantly after lunch.
a block of mass m = 2.50 kg is pushed a distance of d = 2.20 m along a frictionless horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle of 25.0 degrees below the horizontal
a wheel is spinning freely on its axis with an angular velocity w of 2 rad/s. What is its renitic energy if the angular velocity is increased to 10 rad/s
On a spacecraft, two engines fire for a time of 598 s. One gives the craft an acceleration in the x direction of ax = 4.92 m/s^2, Calculate the magnitude of the initial velocity
A farsighted person has a near point of 50-cm from her eyes. She wants glasses that would let her see objects at a distance of only 25.00 cm from her eyes. Determine out the focal length of the glasses needed if the glasses are 2 cm and 3 cm from ..
A hoop rolls without slipping down a ramp that is inclined at 35 degrees above the horizontal. Calculate the length of the ramp
It is 155cm from your eyes to your toes. You're standing 190cm in front of the tall mirror. How far is it from your eyes to the image of your toes.
A rifle fires a 2.39 10-2-kg pellet straight upward, since the pellet rests on a compressed spring that is released when the trigger is pulled. The spring has a negligible mass and is compressed by 9.17 10-2 m from its unstrained length. The pellet r..
A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 40 at 20°C. what is the temperature coefficient of resistivity
A 10 g bullet traveling at 430m/s strikes a 13kg , 1.1-m-wide door at the edge opposite the hinge, What is the angular velocity of the door just after impac
If the ball is in contact with the wall for 0.200 s, what is the average force exerted by the wall on the ball? (Suppose right is the positive direction.)
You go to a gym and lift a 245-kg mass 2.13 m over the ground? You hold it for 10 seconds. How much work you did during the holding period
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