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A mass of 7 kg is compressed into a spring on a horizontal surface. It is compressed into the spring 0.79 meters and held still. The force required is 668 Newtons. It is then released from rest and the mass travels over a originally frictionless, horizontal surface, but at the end of the surface there is some friction with a coefficient of kinetic friction of 0.72. It then travels up a frictionless incline with an inclination angle of 17 degrees. It travels a distance of 4 meters up the incline before it stops. What was the length, in meters, of the portion of the horizontal surface that had friction?
A golf ball traveling 3 m/s to the right has a head-on collision with a stationary bowling ball in a friction-free environment. If the collision is almost perfectly elastic, the speed of the golf ball immediately after the collision is:
A uniform magnetic field passes through a horizontal circular wire loop at an angle 17.3Â degree from the normal to plane of the loop. Evaluate what the magnetic flux through the loop
Find the final velocities of (a) the 2.70-kg ball and of (b) the 7.10-kg ball if the collision is elastic. (c) Find the magnitude and direction of the final velocity of the two balls if the collision is completely inelastic.
A car is driving at a constant speed of 50km/hr. Another car starts from the same position after 20 seconds. What is the velocity of the second car
Calculate the solar constant at the location of Venus, and estimate what the average surface temperature of Venus would be if it had no atmosphere and did not reflect any sunlight.
a small mailbag is released from a helicopter that is descending steadily at 3.00 ms.a after 5.00 s what is the speed
consider a uranium nucleus to be a sphere of radius r 7.4 times 10-15 m with a charge of 92e distributed uniformly
When a battery is connected to a 100 ohm resistor, the current is 4.00Amps. When the same battery is connected to a 450 ohm resistor, the current is 1.09 Amps. Find the emf supplied by the battery
The two angled ropes used to support the crate in the figure below an withstand a maximum tension of1400Nbefore they break. What is the largest mass the ropes can support
How do you measure the mass of an astronaut in orbit? (You can't just use a scale!) For the Skylab program, What is the mass of the astronaut
A man pushes a lawn mower on a level lawn by a force of 215 N. If 31% of this force is directed downward, and 50 W of power is expanded in pushing the mower 5.8 m, how much time is spent in pushing the mower this distance?-------s
You are driving to the grocery store at 19m/s. You are 120m from an intersection when the traffic light turns red. How long does it take you to stop
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