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A biker jumps from one ramp to another. Assuming the ramps have an incline of 30? and are spaced by 40 m, what speed (in units of km/hr) does the biker need to leave the first ramp in order to successfully land on the other ramp?
You are riding in an elevator on the way to18th floor in your dormitory. The elevator is accelerating upward witha=1.90m/s2. Beside you is the box containing your new computer; boxand contents have a total mass of 28.0kg.
A camera has a lens with a focal length of 22.2 cm. When an object is placed 3.55 meters away is being photographed
A juvenile elephant has a mass of 300kg. He wishes to fly using his very large ears. find the total surface area of his two ears
What average total force acted on the car. How far did the car travel during that time.
A swimmer looks upward from the bottom of a 4.0-m-deep swimming pool. How far from the swimmer does the board appear to be
A girl is whirling a ball on a string around her head in ahorizontal plane. She wants to let go at precisely the right timeso that the ball will hit a target on the other side of the yard. When should she let go of the string
The force exerted by the wind on the sails of a sailboat is Fsail = 480 Newton north. obtain the magnitude and direction of its acceleration
A wheelchair athlete is training on a stationary ergometer. Her wheel's angular velocity is 3 rev/s and diameter is 80.0 cm. What is the linear velocity at the wheel's circumference
A 75.0 kg stunt man jumps from a balcony and falls 26.5 m before colliding with a pile of mattresses. what is the average force exertedby the mattresses on the stuntman
A 20 gram sample of refuse derived fuel has a heat capacity of 13,000 cal/°C and a heat value of 2800 cal/g. What temperature rise is expected when the sample is combusted in a calorimeter
A neutron star has a mass of 2.0*10^30 kg (about the mass of our sun) and a radius of 5.2*10^3 m (about the height of a good-sized mountain). assume an object falls from rest near the surface of such a sta
q1. a rifle fires a 2.39 10-2-kg pellet straight upward since the pellet rests on a compressed spring that is released
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