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Julie has been hired to help paint the trim of a building, but she is not convinced of the safety of the apparatus. A 4.4 m plank is suspended horizontally from the top of the building by ropes attached at each end. She knows from previous experience that the ropes being used will break if the tension exceeds 1.0 kN. Her 90 kg boss dismisses Julie's worries and begins painting while standing 1.0 m from the end of the plank. If Julie's mass is 51 kg and the plank has a mass of 21 kg, then over what range of positions can Julie stand to join her boss without causing the ropes to break?
A person applies a horizontal force to the top edge of a crate to get it to tip forward. Find the minimum force needed to make the crate start tipping
croquet balls all have a mass of 0.5kg. the green ball is moving at 12.0ms and strikes a blue ball which is still after
A spiral staircase winds up to the top of a tower in an old castle. To measure the height of the tower, a rope is attached to the top of the tower, What is the height of the tower
What is the muzzle velocity
Monochromatic light is incident from the top onto two glass plates, as the drawing shows. What happens to the bright fringes
A 99 kg rock with a volume of15 L is completely submerged in water.The density of water is 1 kg/L. What volume of water is displaced by the rock?
A pilot is flying a plane with a speed (with respect to air) at 220m/s in a region where the wind is blowing at a constant 30.0 m/s at 20.0 degree South of West. Obtain in what direction should she head the plane
A 60 kg man is ice-skating due north with a velocity of 6.0 m/s when he collides with a 36 kg child. What is the direction of the child's velocity just before the collision
Two unfortunate climbers, roped together, are sliding freely down an icy mountainside. The upp climber(mass 73 kg) is on a 12 degree slope to the Horizontal, but the lower climber(mass63kg) has gone over edge to a steeper slop of 38 degrees.
A bat strikes a 0.145- baseball. Just before impact, the ball is traveling horizontally to the right at a speed of 40.0 , Find the vertical component of the average force on the ball
A basketball player is 15 ft horizontally from the center of the basket, which is 10 off the ground. At what angle should the player aim the ball if it is thrown from a height of 8.2 ft with a speed of 28 ft/s
in a haynes- shockley experiment the distance between the cross r and a is d0.1m t0.25 milliseconds if the carriers are
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