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1. A boy whirls a stone in a horizontal circle 1.6m above the ground, by means of a string 1.4 m long. The angle between the string and horizontal plane is 10o. The string breaks and the stone flies of horizontally. It strikes the ground at the point that is 6 maway horizontally.
What was the centripetal acceleration of the stone while in circular motion?2. A diver springs upward from a board that is threemeters above water. At an instant he contacts the water his speedis 9.20 m/s and his body makes an angle of 78.0o with respect to the horizontal surface of the water.
(a) Determine his initial velocity (magnitude anddirection).
(b) What is his maximum height above the watersurface?(c) Find the horizontal distance between hisinitial and final points.
The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest, Determine the cheetah's average acceleration during the short sprint
Newton's second law could be stated either as , or as force equals time rate of change of linear momentum. For simple rotational motion the corresponding law is stated as , or torque equals time rate of change of angular momentum.
The primary coil of a transformer has 3,802 loops. The secondary coil has 602,030 loops. The primary coil has a 97 A current and 2 V. ) Determine the power of the primary coil......W. Assuming no losses, determine the power of the secondary coil......
A thin spherical shell has a radius R=3 m. A constant force F=2 N is applied to the shell, always tangential to the surface of the sphere, What is the mass of the shell
Two cars traveling with the same speed move directly away from one another. What is the speed of the cars
What is the magnitude of the auto average acceleration.
A heat engine takes in 400J of energy from a hot reservoir and performs 35J of work in each cycle. obtain the energy expelled to the cold reservoir in each cycle
A plane is flying at an altitude of 10000 metres, and the pitot tube measures a gauge pressure of 10kPa. What is the airspeed of the plane
Suppose you hear a clap of thunder 15.80 s after seeing the associated lightning stroke. The speed of sound waves in air is 343-m/s, and the speed of light in air is 3.00x 10^8 m/s.
question1it has been asserted that a permanent magnet is really just made up of an insulator with fixed positive
a box of Cheerios (mass mC = 1.8 kg) and a box of Wheaties (mass mW = 2.5 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. what is the magnitude of the force on the Wheaties box from the Cheerios bo..
A cannon shoots a ball with an initial velocity of 152-m/s and a launch angle of 62°. The gravitational acceleration is 9.80 m/s2. Assuming no air resistance, how long would the cannonball stay in the air.
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