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A ball is thrown up with an initial speed of 32m/s from a height of 84m.
1. How long is the ball in the air?
2. What is its impact speed with the ground?
3. At what time wills the object be halfway between the starting point and the ground,
4. At what positions will the ball be when half the total time has passed?
A 120 kg scaffold is 6.6 meters long. It is hanging with two wires, one from each end. A 540 kg box sits 1 meter from the left end. What is the tension in the right hand side wire?
as a physics demonstration a fire syringe is used to demonstrate the high temperatures that can be reached inside a
A heat pump has a coefficient of performance of 3.75 and operates with a power consumption of 6.93 103 W. How much energy does it extract from the outside air
Two converging lenses, the first by focal length 10.0 cm and the second with focal length 20.0 cm, are separated by 40.0 cm. An object, 3.00 cm in height, is placed 30.0 cm in front of the first lens. Where is the final image formed?
Your adventurous friend Lola goes bungee jumping. She leaps from a bridge that is 100 m above a river. WHat is her height above the river at her lowest point
a 1250 kg car is traveling around a banked curve at a speed of 23.5 m/s. the curve is banked 24 degrees to the horizontal. draw a free body diagram for the car, including all forces acting on it. clearly label and name each force
A model rocket is constructed with a motor that can provide a total impulse of 39.0 N·s. The mass of the rocket is 0.229 kg. What is the speed that this rocket achieves when it is launched from rest? Neglect the effects of gravity and air resistance.
a 5.0 box is on a frictionless 45 slope and is connected via a massless string over a massless frictionless pulley to a
Use the work-energy theorem to solve each of these problems. Youcan use Newton's laws to check your answers. Neglect air resistancein all cases. A branch falls from the top of a96.0-m-tall redwood tree, startingfrom rest. How fast is it moving when ..
What would be apparent speed of the spacecraft image
Estimate how many electrons there are in your body.(my approxmass is 7.94 kg) Make any assumptions you feel are necessary, butclearly state what they are
suppose we measure the resistance from one hand to the other and find it to be 2 kilo ohms. What is the resistivity of skin
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