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The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a steep ramp. The other box is heavier and rests on a ramp that is less steep. The boxes are released from rest at A and allowed to slide down the ramps. The two boxes have masses of 14 and 32 kg. If A and B are 6.0 and 1.0 m, respectively, above the ground, decide the speed of (a) the lighter box and(b) the heavier box when each reaches B.(c) What is the ratio of the kinetic energy of the heavier box to that of the lighter box at B?
In exercise physiology studies, it is sometimes important to determine the location of a person's center of gravity. How far from the woman's feet is her center of gravity
A prospector finds a solid rock composed of granite (? = 2650 kg/m3) and gold. The volume of the rock is 3.00e-4 m3 and its mass is 3.48 kg. (a) What mass of gold is contained in the rock in kg? (b) What percentage of the rock is gold by volume? (..
Quarterback Fred is going to throw a pass to tight end Doug.Doug is 20m in front of Fred and running in a straight line away at 6. m/s when fred throws the 500g ball at a 40 deg angle, How fast did Fred throw the ball
What are the strength and direction of the electric field at the position indicated by the dot in the figure below, in which q = 3 nC, d = 11 cm, and the positive x-axis points to the right?
a ball is thrown straight up from a bridge at 20.0 ms. the ball reaches its maximum height falls just misses the bridge
A parallel-plate capacitor in air has a plate separation of 1.35 cm and a plate area of 25.0 cm2. Determine the charge on the plates before and after immersion
an object has a volume of 3.29 m3 and a mass of 3000 kg. do you expect the object to sink or float in water? if the
how many electrons must be removed from each of two 5.0-kg. copper spheres to make the electric force of repulsion
An ant with mass m is standing peacefully on top of ahorizontal, stretched rope. The rope has mass per unitlength μ and is under tension F. Without warning, Throckmorton starts a sinusoidal transverse wave of wavelength lambda propagating along th..
A string length 2.0 m and linear mass density 25.0 mg/m vibrates at a fundamental frequency of 450.0 Hz. What is the speed of the transverse strin waves
a bullet moving at 200 m/s strikes a wooden block which has several hundred times the bullets mass. what happened to the rest of the energy
A thin 5.6-m metal rod sustanins a longitudinal standing wave with vibration antinodes at each end of the rod. What is the frequency of the rod's vibration
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