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A child throws a ball straight up with an initial speed of 10m/s.
a) Estimate the maximum height above the child hand that the ball reaches.
b) Determine the velocity of the ball 2s after it leaves the child's hand?
Suppose that while moving into an apartment you move a refridgerator into place by sliding it across the floor. What is the least force you could exert on the fridge to move it
A man of mass M1 = 81 kg is standing on a M2 = 6960 kg railroad flatcar that rolls without friction to the right with speed 3.6 m/s. Calculate the change in velocity (in m/s) of the flatcar, if the man runs to the left so that his speed relative t..
Two blocks are in contact on a frictionless table. A horizontal force F is applied to m1. If m1 = 1.66 kg, m2 = 3.72 kg, and F = 6.25 N, find the magnitude of the force between the two blocks
For a particular scientific experiment, it is important to be completely isolated from any magnetic field, including the earth's field. What is the current in the current loop
Some bacteria are propelled by motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocityhas a radius of 1.9x10-8m, and a tangential speed at therim of 2.9x10-5 m/s.
A child ties a rock to a string and whirls it around in a horizontal circle. Find the period of its uniform circular motion
A researcher would like to perform an experiment in a zero magnetic field, which means that the field of the earth must be cancelled. What current is needed in the solenoid's wires
Consider a solid metal conductor in static equilbrium. What is the electric field inside the conductor
A student plays around with a 1.0m ruler that can be setup in a stand by means of a knife edge clamp. He puts the knife edge clamp, and the pivot point, at the point where the ruler reads 30 cm. The student realizes this is not a stable position a..
A 175 kilogram ball on the end of a string is revolving uniformly in a horizontal circle of radius 0.500 meter. The ball makes 2.00 revolutions in a second. Compute the force a person must exert on opposite end of the string
calculate the ratio of the drag force on a jet flying at 800 kmh at an altitude of 8.0 km to the drag force on a
A 3.8 kg bucket of water is raised from a well by a rope. The acceleration of gravity is 9.8 m/s2. find the force exerted by the rope on the bucket
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