A 9 kg ball is dropped from a height of 3.0 m. Determine the speed of the ball just before it hits the ground. Hint: Use the work energy theorem. The kinetic energy of the ball will be equal to the work done by gravity.
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A 9 kg ball is dropped from a height of 3.0 m. Determine the speed of the ball just before it hits the ground. Hint: Use the work energy theorem. The kinetic energy of the ball will be equal to the work done by gravity.
According to the work Energy theorem
where
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- The graph shows the x component of a force that acts on an object that moves on the x axis. The vertical spacing between adjacent grid lines is 4.98N, while the horizontal spacing between adjacent grid lines is 1.0m. What is the work, in joules, done by the force as the object moves from x = 4m to x = 5m ? F (N) C C 0 x (m)A 0.32-kg particle has a speed of 5.0 m/s at point A and kinetic energy of 8.4 J at point B. (a) What is its kinetic energy at A?J(b) What is its speed at point B?m/s(c) What is the total work done on the particle as it moves from A to B?JA 0.59-kg particle has a speed of 5.0 m/s at point A and kinetic energy of 8.5 J at point B. (a) What is its kinetic energy at A? J(b) What is its speed at point B? m/s(c) What is the total work done on the particle as it moves from A to B? J
- In the arrangement of the first figure, we gradually pull the block from x = 0 to x = +3.0 cm, where it is stationary. The second figure gives the work that our force does on the block. The scale of the figure's vertical axis is set by Ws = 1.0 J. We then pull the block out to x = +6.0 cm and release it from rest. How much work does the spring do on the block when the block moves from xi = +6.0 cm to (a) x = +4.0 cm, (b) x = -1.0 cm, and (c) x = -6.0 cm?An 8.10 kg package in a mail-sorting room slides 2.30 m down a chute that is inclined at 51.8 degrees below the horizontal. The coefficient of kinetic friction between the package and the chute's surface is 0.44. Part A- What is the net work done on the package?Express your answer in joules. Part B-Calculate the work done on the package by gravity. Express your answer in joules. Part C-Calculate the work done on the package by the normal force.Express your answer in joules. Part D- What is the net work done on the package? Express your answer in joules.Reference: Horsepower Lab. John, of mass 82.4 kg, can do work for about 2.0 minutes at the rate of 1.0 hp. How long will it take him to climb three flights of stairs, a vertical height of 12.0 m? 1hp = 1 horsepower.