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A uniform board is leaning against a smooth vertical wall. The board is at an angle (theta) above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.560. Find the smallest value for the angle (theta), such that the lower end of the board does not slide along the ground.
______ degrees
A ranger in a national park is driving at 24.0 mi/h when a deer jumps into the road 270 ft ahead of the vehicle. After a reaction time of t, ranger applies the brakes to produce an acceleration of a = -9.00 ft/s2. What is the greatest reaction tim..
What travel time is required for the landing
Why is it better for some purposes to use a medium size telescope on a mountain instead of a telescope in space?
On earth, two parts of a space probe weigh 14000 N and 3500 N. These parts are separated by the center-to-center distance of 8m and may be treated as uniform spherical objects. Find out the magnitude of the gravitational force that each part exerts o..
A hot air balloon is rising straight up with a speed of 6.0 m/s. A ballast bag is released from rest relative to the balloon when it is 9.54 m above the ground. How much time elapses before the ballast bag hits ground.
A baseball is thrown straight up. The drag force is proportional to.In terms of, what is the y-component of ball's acceleration when its speed is half its terminal speed and it is moving up.
Two particles of charge Q(-L,0) and nQ(αL,0) where n = 10. When a third charge is placed at the origin, it is found that the force on it is zero. Find out α.
A 72 kg man stands on a spring scale in an elevator. Starting from rest, elevator ascends, attaining its maximum speed of 1.20 m/s in 0.80 s.
An initially motionless test car is accelerated uniformly to 145km/h in 8.28s before striking a simulated deer. The car is in contact with the faux fawn for .815s, after which the car is measured to be traveling at 82.0km/h. What is the magnitude ..
Does an apple tree exert a gravitational force on the earth and if so, how large of a force? Consider and explain this question when the apple is attached to the tree, and when it is falling.
A toy train rolls around a horizontal 1.70 diameter track. The coefficient of rolling friction is 0.10. What is the magnitude of the train's angular acceleration after it is released? (Found) How long does it take the train to stop if it's releas..
Estimate the distance of GPS satellite from the ground.
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