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Consider the following situation. A block of mass 20 kg is initially at rest on an inclined that makes an angle of 37 degrees with the horizontal. The block is now being pulled up the plane by a rope with a tension of 250 N and also the rope makes an angle of 37 degrees to the plane (to the plane, not to the horizontal). If the frictional force experienced by the block, is 8 N, the acceleration of the block is > ? < m/s2. Calculate your answer to one decimal point.
a moving particle encounters an external electric field that decreases its kinetic energy from 9910 ev to 6840 ev as
a man exerts a force of 60n straight up to lift a watermelon that weighs 2.5 kg. what is the acceleration of the
A light wave has a 628 nm wavelength in vacuum. It enters a solid where n = 1.36. What is the speed of light, wavelength of light and frequency of light in the solid
According to a report on traumatic brain injury, the force that a professional boxer's fist exerts on his opponent's head is equivalent to being hit with a 5.9 kg bowling ball traveling at 8.9 m/s that stops in 0.018s
With its double helix structure, DNA is coiled like a spring. A biophysicist grabs the end of a DNA strand with optical tweezers, What's the DNA spring constant
A 6 Kg block is on a frictionless plane inclined at 37 degrees. The block is attached by a weightless cord passing over a frictionless peg to a hanging block of mass 4 Kg., Does it go up the plane or down? How do you know
A point charge +6.7 uC is placed at the origin, and a second charge -3.6 uC is placed in the X - Y plane at (0.40 m , 0.55 m ). Where should a third charge be placed in the plane
A pulsed laser emits light in a series of short pulses, each having a duration of 23.0 ms. The average power of each pulse is 4.70 mW, Find the number of photons in each pulse
At our distance from the Sun, the intensity of solar radiation is 1370 W/m2. The temperature of the Earth is affected by the greenhouse effect of the atmosphere.
A balloon is initially stationary and full of air. The air in the balloon has a mass of 2 g. What speed does the balloon have
A billiard ball moving at 6.00 m/s strikes a stationary ball of the same mass. After the collision, the first ball moves at 5.12 m/s at an angle of 31.5° with respect to the original line of motion. find the struck ball's velocity after the collisi..
Jonathan is riding a bicycle and encounters a hill of height h. What is the total external work done on the system of Jonathan and the bicycle between the time he starts up the hill and the time he reaches the top
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