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Q. In a college homecoming competition, eighteen students lift a sports car. Though holding the car off the ground, each student exerts an upward force of 390 N. What is the mass of the car in kilograms? What is its weight in pounds?
The minimum distance required to stop a car moving at 38.0 mi/h is 41.0 ft. What is the minimum stopping distance for the same car moving at 68 mi/h, suppose the same rate of acceleration.
hear the sound of it hitting ground at the foot of the cliff. Ignoring air resistance, how high is the cliff if the speed of sound is 330 {rm m/s}.
What are speed and direction of the ball after the collision
A grating has 776 lines per centimeter. Find out the angles of the first three principal maxima above the central fringe when this grating is illuminated with 603 nm light.
On a vacation flight, you look out the window of the jet and wonder about the forces exerted on the window.
A car is behind a truck going 25m/s on the highway. The car's driver looks for an opportunity to pass, guessing that his car can accelerate at 1.0m/s2. He gauges that he has to cover the 20-m length of the truck, plus 10m clear room at the rear of..
Then find the force between them as a function of distance h. describe why the sign of the force does (or does not) make sense to you.
What value does this give for the speed of sound in air. What is the speed of the ball at that point.
how many electrons have been transferred. If a metric ton is 1.000 103 kg, how various 90 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton.
Compared to an object that does not roll, other than instead slides without friction, should a rolling object be released from same, a greater, or a lesser height in order just barely to complete the loop the loop.
A helicopter is ascending perpendicularly with a speed of 5.02 {rm m/s}. At a height of 115 {rm m} above the Earth, a package is dropped from the window.
Eight books, each 3.90 cm thick with mass 1.70 kg, lie flat on a table. How much work is required to stack them on top of each other.
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