A 11 g plastic ball is thrown horizontally at 12 m/s from x = 0 m. It experiences an increasing headwind that exerts a drag force Fx=−(2.0×10−3N/m)x.
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A: Concept
A 11 g plastic ball is thrown horizontally at 12 m/s from x = 0 m. It experiences an increasing headwind that exerts a drag force Fx=−(2.0×10−3N/m)x.
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- A 13 gg plastic ball is thrown horizontally at 15 m/sm/s from xx = 0 mm. It experiences an increasing headwind that exerts a drag force Fx=−(2.0×10−3N/m)xFx=−(2.0×10−3N/m)x.How far does the ball travel before reversing direction and being blown backward?An object of mass m=2 kg placed on a rough horizontal surface is given an initial speed of 9m/s and comes to rest after covering a distance d=12m. The kinetic friction f k is equal to: VA= 8m/sec A d 8.33 N 9.85 N 5.33 N 4.66 N 6.75 N VB=0 BA team of astronauts is on a mission to land on and explore a large asteroid. In addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. With what minimum initial speed ?esc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? Assume that the asteroid is approximately spherical, with an average density ?=2.93×106 g/m3 and volume ?=1.94×1012 m3 . Recall that the universal gravitational constant is ?=6.67×10-11 N·m2/kg2 .vesc = ? m/s
- A frictionless block of mass 0.5 kg slides down a ramp of height 0.2 m and onto a horizontal frictionless table. A circular frictionless wall forces the block to move in a circular path. Using gravity as 10m/s^2, calculate the vertical component of the net force on the block.A 12 kg box is released from the top of an incline that is 5 m long and makes an angle of 40 degrees to the horizontal. The friction force between the box and the incline is 60 N. What is the coecient of kinetic friction µk between the box and the incline?About 80 gram of blood is pumped from the heart during each heartbeat. The blood starts at rest and has a speed of 0.6 m/sec in the aorta. If the pumping takes 0.17 sec, what is the magnitude of the force on the blood?
- A warehouse worker is pushing a 90.0 kg crate with a horizontal force of 300 N at a speed of v = 0.850 m/s across the warehouse floor. He encounters a rough horizontal section of the floor that is 0.75 m long and where the coefficient of kinetic friction between the crate and floor is 0.360. m (a) Determine the magnitude and direction of the net force acting on the crate while it is pushed over the rough section of the floor. magnitude Have you drawn a force diagram and identified all forces acting on the crate? N direction --Select-- X Have you drawn a force diagram and identified all forces acting on the crate? (b) Determine the net work done on the crate while it is pushed over the rough section of the floor. Can you write an expression for the net work done on the crate in terms of the net force acting on the crate? J (c) Find the speed of the crate when it reaches the end of the rough surface. Can you develop an expression for the final speed of the crate in terms of its initial…A 6.1-g bullet has a velocity of 475 m/s when it penetrates a wooden door to a depth of 3.5 cm. Assuming the frictional force that stops the bullet is constant, how long does it take from the time the bullet hits the door till it comes to a stop?A warehouse worker is pushing a 90.0 kg crate with a horizontal force of 291 N at a speed of v = 0.850 m/s across the warehouse floor. He encounters a rough horizontal section of the floor that is 0.75 m long and where the coefficient of kinetic friction between the crate and floor is 0.351. m (a) Determine the magnitude and direction of the net force acting on the crate while it is pushed over the rough section of the floor. magnitude direction --Select--- (b) Determine the net work done on the crate while it is pushed over the rough section of the floor. (c) Find the speed of the crate when it reaches the end of the rough surface. m/s
- The 60-kg crate is projected along the floor with an initial speed of vo = 6.8 m/s at x = 0. The coefficient of kinetic friction is μk = 0.55. Calculate the time t required for the crate to come to rest and the corresponding distance x traveled. Answers: t = Hk X = i VO S mA 15g plastic ball is thrown horizontally at 12 m/s from x = 0m. It experiences an increasing headwind that exerts a drag force: Fx=-2x10-3 N/m How far does the ball travel before reversing directions and being blown backwards?A hockey puck with mass 0.167 kg is pushed across the ice with a constant force of 0.56 N. The coefficient of kinetic friction between the puck and the ice is 0.13. After a distance of 2.3 m, what is the puck's speed in m/s?