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A hockey puck slides over ice with ?k = 0.013. What initial speed should the puck have so it travels the 40m length of the rink?
Estimate the temperature change of the air in 2 h
If the ball is free from rest at a height of 0.67 above the bottom of the track on the no-slip side, what is its angular speed when it is on the frictionless side of the track? Suppose the ball is a solid sphere of radius 2.2 and mass 0.14.
A horizontal block-spring system with the block on a frictionless surface has total mechanical energy E = 55.1 J, What is the kinetic energy of the system at the equilibrium point
Two loudspeakers emit 500Hz notes. One speaker sits on the ground. The other speaker is in the back of a pickup truck, What is the truck's speed
A 1.0-cm-diameter pipe widens to 2.0 cm, then narrows to 0.5 cm. Liquid flows through the first segment at a speed of 9.0 m/s. What is the speed in the second segment
A 0.20-kg baseball is dropped and reaches a speed of 1.0 m/s just before it hits the ground. What is the change in the ball's momentum
A hunk of aluminum is completely covered with a gold shell to form an ingot of weight 44.0N. What is the weight of the gold in the shell
A 10.60 weather rocket generates a thrust of 220. The rocket, pointing upward, is clamped to the top of the vertical spring. The bottom of the spring, whose spring constant is 450, is anchored to the ground.
During a hard sneeze, your eyes might shut for 0.50s. If you are driving a car at 90 km/h during such a sneeze, how far does the car move during time.
A computer to be used in a satellite must be able to withstand accelerations of up to 24 times the acceleration due to gravity, What is the minimum amplitude of vibration that must be used in this test
What horizontal force is needed to hold bag in new position
The electric motor of a model train accelerates the train from rest to 0.600m/s in 18ms. The total mass of the train is 515g. Find the average power delivered to the train
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