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A worker is testing a multiple pulley system to estimate the heaviest object that he could lift. The largest downward force he could exert is equal to his weight 875N. When the worker moves rope1.5m the object moves 0.25m. What is the heaviest object that he could lift?
The plates of a capacitor are separated by 0.0050 m. The capacitor is charged by a potential difference of 5.0 V and then disconnected. Now you separate the plates to a distance of 0.015 m. What is the new potential difference between the plates?
A vector has an x-component of ?30.0units, Find the magnitude and direction of the vector
You're in an airplane that flies horizontally with speed 1000 km/h (280m/s) when an engine falls off. Neglect air resistance suppose it takes 30s for the engine to hit the ground.
suppose that a basketball league has 32 teams split into two conferences of 16 teams each. each conference is split
A mass of 145 g of hot coffee at 90.0 oC is poured into an insulated cup containing 240 g of ice initially at 0.0 oC. How many grams of liquid will there be then
A Ferris wheel with a radius of 8.1 meter rotates at a constant rate, completing one revolution every 45 sec. Determine the direction and magnitude of a passenger's acceleration when at the top of the Ferris wheel
A whistle of frequency 520 Hz moves in a circle of radius 80.0 cm at an angular speed of 12.0 rad/s. What are the lowest and highest frequencies heard by a listener a long distance away from the whistle and at rest with respect to the center of th..
A 1.63 kg block of ice is sliding by you on a very slippery floor at m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with ice block for 0.005 seconds. The block eventually slides at the angle of 24 degre..
an artillery shell is fired with an initial velocity of 300 ms at 59.5deg above the horizontal. to clear an avalanche
A 15m long rope of m=1.8kg is stretched such that the tension in the rope is 25N. calculate the displacement of a particle in the rope at t=10s, when the wave is at x=0.5m
A tennis ball (m = 54 gram) is projected vertically with an initial speed of 9.6 m/s. Find how much higher would the ball have gone in a vacuum
A laser beam is incident on two slits with a separation of 0.230 mm, and a screen is placed 5.10 m from the slits. what is the wavelength of the laser light
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