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A 5kg object is initally at rest. The object is acted on by a 9N force toward the east for 3 seconds. No force acts on the object for the next 4 seconds. How far has the object moved during this 7 second interval?
A satellite in geosynchronous orbit above the moon will go around once in 27.3 days. what is the orbital radius of the satellite
A 0.45kg mass is attached to a spring with a force constant of 21N/m and released from rest a distance of 3.6cm from the equilibrium position of the spring, How far is the mass from the equilibrium position
A brass rod 25.0 cm long and 1 cm in diameter is welded end to end to a copper rod 25.0 cm long and 0.50 cm in diameter. What is the temperature at the brass / copper junction
A fully equipped astronaut has a mass of 140 kg. If the astronaut has a weight of 675 N standing on the surface of a planet, what is the acceleration due to gravity on this planet?
question1the bumper car with mass m1 109 kg is moving to the right with a velocity of v1 4.9 ms. the second bumper
you drive due east at 85km/h for 50min. then you follow a road going 60 degrees south of east, going 90km/h for another 30min. Find your total displacement
When you ride a bicycle at constant speed, almost all of the energy you expend goes into the work you do against the drag force of the air. how much power does she expend as she cycles
A Carnot heat engine is to be designed with an efficiency of 81%. what is the temperature of the "hot" reservoir
a 0.45 kg croquet ball is initially at rest on the grass. when the ball is struck by a mallet, how long was the mallet in contact with the ball
An ideal spring with a spring constant of 25.0 N/m is suspended vertically. A 1.00 kg object is attached to the unstretched spring and released. Determine the magnitude of the oscillations
How many revolutions per minute would a 29 {rm m}-diameter Ferris wheel require to make for the passengers to feel "weightless" at topmost point.
A toy car with mass of m=166 GRAMS crashes into a spring with constant k=45 N/m. If the car was going v=1.5 m/s, then how far will the spring compress.
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