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A rock is thrown vertically upward with a speed of 11.0m/s from the roof of a building that is 70.0m above the ground. Assume free fall.
A) In how many seconds after being thrown does the rock strike the ground?
B) What is the speed of the rock just before it strikes the ground?
suppose you are outdoors in the Boundary Water Canoe Area of Northern Minnesota. You have in your hand the empty tube from a roll of paper towel. Outline the mathematical steps you would take to help you achieve an accurate estimate of the stars i..
What are the displacement and velocity of the point on the cord. What is the magnitude of the acceleration of one of the liners toward the other because of their mutual gravitational attraction.
A baseball (m = 137 g) approaches a bat horizontally at the speed of 40.6m/s (91 mi/h) and is hit straight back at a speed of 45.1m/s (101 mi/h). If the ball is in contact with the bat for a time of 1.00 ms, what is the average force exerted on the..
With what frequency should the tip be tapped to make the strip oscillate with maximum amplitude?
A diving board length = 5.60 that weighs 210 is supported by two pillars. One pillar is at the left end of the diving board; other is distance = 1.60 away. Find out the magnitude of force exerted by the left pillar while an 85.0 diver stands at th..
A 55-kg swimmer is standing on a stationary 210-kg floating raft. The swimmer then runs off the raft horizontally with a velocity of +4.6 meter per second relative to the shore. Calculate the recoil velocity that the raft would have if there were ..
Suppose your body was able to use the chemical energy in gasoline, How far could you pedal a bicycle? How far could you pedal a bicycle at 15km/hr on the energy in 1.8 gal of gas? (1 gal of gas has a mass of 3.2 kg)
A high-speed photograph of a club hitting a golf ball. The club was in contact with a ball, initially at rest, for about 0.0028s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 1.8 102 ft/s, find out the average forc..
The mass of a roller-coaster car, including its passengers, is 495kg. Its speed at the bottom of the track in the figure below is 17.00 m/s. The radius of this section of track is r1 = 26 m. Find the force that a seat in the roller-coaster car exerts..
A 700 N window washer is standing on a uniform scaffold supported by a vertical rope at each end. The scaffold weighs 200 N and is 3 m long. what is the force in each rope when washer stands 1 m from one end.
A prescription for a corrective lens calls for +1.50D. The lensmaker grinds the lens from a "blank" with n = 1.56 and a preformed convex front surface of radius of curvature of 40.0 cm. What should be the radius of curvature of the other surface?
he boat continues for an additional 5.90 s with an acceleration of +0.518 m/s2. Following this, the boat accelerates at -1.49 m/s2 for 8.05 s. What is the velocity of the boat at t = 21.35 s? Find out the total displacement of the boat?
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