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The position of a mass that is oscillating on a spring is given by x= (12.3 cm) cos[(1.26 s^-1)t]. What is the speed of the mass when t= 0.805s?
Driving in your car with a constant speed of 13 m/s, you encounter a bump in the road that has a circular cross section, as indicated in the figure. If the radius of curvature of the bump is r = 29 m, find the apparent weight of a 59-kg person in you..
A 55 kg swimmer is standing on a stationary 225 kg floating raft. The swimmer then runs off the raft horizontally with a velocity of +4.7 m/s relative to theshore. Find the recoil velocity that the raft would have if there were no friction and resist..
imagine that you are standing and facing a 60-w incanddescent lightbulb 100m away. if the diameter of you pupils is
A 10.0 g lead ri?e bullet is ?red with a speed of v into a ballistic pendulum with mass 10.00 kg, suspended from a cord 10.0 cm long.
Two carts with masses of 4.80 kg and 2.78 kg move toward each other on a frictionless track with speeds of 4.94m/s and 3.17m/s respectively. The carts stick together after colliding head-on. Find out the final speed.
In a fit, a toddler throws straight down his favorite 1.5 kg toy with an initial velocity of 2.9 m/s. What is the magnitude of the change in velocity of the toy from t = 0.25 seconds to t = 0.47 seconds?
The image of a tree 10 m high and 20 m away is 1.5 cm high when photographed. What is the focal length of the lens in the camera
You may solve this problem using either tabulated values from the tables or constant specific heats. Calculate the rate of heat addition
A cyclist travelling at 5.0 m/s uniformly accelerates up to 10.0 m/s in 2.0 sec. Find through what angle does the pebble revolve
a student m 97 kg runs at a velocity vi 2.85 ms before jumping on a skateboard. after jumping on the board the
What is the tension in the cord in the original situation. A cube of ice is taken from the freezer at -9.3°C and placed in a 95 g aluminum calorimeter filled with 297 g of water at room temperature of 20°C. The final situation is observed to be all..
Four identical springs support equally tghe weight of a 1300 kg car. the car driver goes over a speed bump, find the oscillation period
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