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During a circus act, one performer swings upside down hanging from a trapeze holding another, also upside-down, performer by the legs. If the upward force on the lower performer is three times her weight, how much (in m) do the bones (the femurs) in her upper legs stretch? You may assume each is equivalent to a uniform rod 30.0 cm long and 1.70 cm in radius. Her mass is 57.5 kg.
A 4.0 kilogram mass has a velocity of 4m/s ,east when it explodes into two 2 kilogram masses. Find the magnitude of the velocity of the other mass after explosion
a 45.0-kg crate is dragged at constant velocity 8.20-m across a horizontal floor with a rope making a 30 degree angle
A 4.60g coin is placed 19.0cm from the center of a turntable. What is the maximum angular velocity
Water flows over a section of Niagara Falls at the rate of12.9 x10e6 kg/s and falls 54m. How much power is generated bythe falling water
A diverging lens (f = -12.0 cm) is located 24.0 cm to the left of a converging lens (f = 32.0 cm). What is the height of the final image
A 369 g ball moving at -27 m/s is hit by a bat. The ball moves in the opposite direction at 35 m/s. How long did it interact with the bat if the average force was 278 N
an object is in front of a converging lens f 0.40 m. the magnification of the lens is m 2.1. relative to the lens
a metal rod 3 meters long is held in place by a cable with tension t the cable is attached to the rod 1 m from the end
A small, 300 g cart is moving at 1.10 m/s on an air track when it collides with a larger, 4.00 kg cart at rest, What is the speed of the large cart after the collision
The period of oscillation of a spring-and-mass system is0.50 s and the amplitude is 5.0 cm. What is the magnitude of the acceleration atthe point of maximum extension of the spring?
A 54kg ice skater moving at 6.4m/s glides to a stop. Assumingthe ice is at 0deg C and that 50% of the heat generated by frictionis absorbed by the ice, how much ice melts
Light waves in air with a frequency of 6.25e14 Hz enter glass with a refractive index of 1.55, what is the wavelength of the light waves inside the glass
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