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An archer shoots an arrow with a velocity of 45 meter per second at an angle of 50 degree with the horizontal. An assistant standing on the level ground 150 meter downrange from the launch point throws an apple straight up with the minimum initial speed necessary to meet the path of the arrow.
(a) Evaluate the initial speed of the apple?
(b) Find at what time after the arrow launch should the apple be thrown so that the arrow hits the apple?
A sample of an unknown material appears to weight 300N in air and200N when immersed in alcohol of specific gravity 0.700. What are(a) the volume and (b) the density of the material?
A cannon tilted upward at 20° fires a cannonball with a speed of 105 m/s. What is the component of the cannonball's velocity parallel to the ground
The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and approximate the human body by a rectangular block with a height of 1.66 m, How much energy does our body lose in one second
Rachel is on the roof of a building, h meters above ground. She throws a heavy ball into the air with a speed v, at an angle ? with respect to the horizontal. Ignore air resistance.
A 2.2-kg cylinder (radius = 0.10 m, length = 0.50 m) is released from rest at thetop of a ramp and allowed to roll without slipping. What is its translational kinetic energy
stainless-steel poles were arranged by an artist for the purpose of producing an enhanced display of lightning in a
A 3 m long rigid beam with a mass of 115 kg is supported at each end. An 60 kg student stands 2 m from support 1. How much upward force does each support exert on the beam.
A 1.85 103 kg car, m, has a speed, vi, of 10.5 m/s. The car then hits a tree. The tree doesn't move, and the car comes to rest, Find the change in kinetic energy of the car
A 180 g block on a 49 cm-long string swings in a circle on a horizontal, frictionless table at 74 rpm.
A 20 g ball is fired horizontally with initial speed v_0 toward a 110 g ball that is hanging motionless from a 1.10 m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 110 g ball swings out to a maximum angle t..
A car starts from rest and then accelerates uniformly to a linear speed of 14 m/s in 38 s. If the tires have a radius of 28 cm, calculate the average linear acceleration of a tire
A 1.6 kg disk with radius 0.63 m is rotating freely at 55 rad/s around an axis perpendicular to its center. A second disk that is not rotating is dropped onto the first disk so that their centers align, and they stick together. The mass of the second..
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