Answered: 8. A 27-kg child, starting from rest,… | bartleby

Related questions

Question

8. A 27-kg child, starting from rest, slides down a playground slide from a height of 3.0 m and arrives at the ground
travelling at 3.1 m/s.
a) Determine the total mechanical energy available at the beginning?
b) Consider the energy transformation, what percent of her initial energy was lost due to friction on the way down
the slide?
O CA
(Σ

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Blurred answer

Similar questions

1. A 50 kg sled is pushed by applying a force F = 400 N, as shown, with = 30°. The surface is rough with 4 =.4. If the sled is being displaced a distance of 60 m, find the work done on the sled by: a. An applied force F. b. The dissipative force. c. The normal force. d. The weight. F. e. The net force.
A cheetah can accelerate from rest to 7.4 m/s (about 17 m/h) in 1.1 seconds. How much average power does the cheetah generate during the acceleration phase of its motion if its mass is 51 kg?a) 1300 W. b) 1500 W. c) 1900 W. d) 2200 W. e) 2600 W.
3. A student drags a 3 kg box 5 m across a rough floor with a force of 40 N. A frictional force of 10 N resists the motion of the box. A) Calculate the work done by the student. B) Calculate the work done by friction. C) Determine the net work done on the box. D) If the box started from rest, how fast is it going at it approaches 5 m? has a yelocity of 8
6. A 62kg basketball player performs a vertical jump of 0.39m. Use the work/energy approach to determine her takeoff velocity in the vertical direction. Then, use your projectile motion equations to determine the athlete's takeoff velocity. Do your two answers agree?
A car engine produces a constant power of P = 341 hp. The car and motor have a combined mass of m = 1830 kg. 1.) The car starts from rest, after t=5 seconds, what is the cars speed, you may assume no energy is required to spin the tires. 2.) Assume a dragster of mass m=1000kg can accelerate to cover 450 m and accelerate in 7.2 s from a dead stop, how much horsepower is the engine producing, assuming acceleration is constant?
A cheetah can accelerate from rest to 7.4 m/s (about 18 m/h) in 1.8 seconds. How much average power does the cheetah generate during the acceleration phase of its motion if its mass is 51 kg?a) 1400 W. b) 1600 W. c) 1800 W. d) 2500 W. e) 2800 W.
3A. A 3.00 kg object if given an initial velocity upward such that its initial kinetic energy is 140 J. a) What is the maximum upward displacement that the object will undergo? b) What change in gravitational potential energy has the object undergone when its velocity is 5.00 m/s upward?
3. a) A 45 g mouse with a kinetic energy of 5.0 J is fleeing a cat. Calculate the speed of the mouse. b) A worker lifts a crate 120 cm vertically. If the lift increases the gravitational potential energy by 97 J, determine the mass of the crate.
3. A 26.00-kg child initially at rest slides down a playground slide from a height of 3.20 m above the bottom of the slide. If her speed at the bottom is 2.80 m/s, how much energy is lost due to friction? J cci16 f16 cci16 ceil6 cci
3. A 60 kg boy does 60 push-ups in 40 s. With each push-up he must lift an average of 70 % of his mass a height of 40 cm off the floor. Calculate the following: a) the work the boy does for each push-up, assuming he does work only when he pushes up b) the total work done in 40 s c) the power for this period
1. A roller-coaster car with a mass of 1200 kg starts at rest from a point 20 m above the ground. At point B, it is 9 m above the ground. [Express your answers in kilojoules (kJ).] a. What is the initial potential energy of the car? b. What is the potential energy at point B? c. If the initial kinetic energy was zero and the work done against friction between the starting point and point B is 40 000 J (40 kJ), what is the kinetic energy of the car at point B 2. The time required for one complete cycle of a mass oscillating at the end of a spring is 0.80 s. What is the frequency of oscillation?
A 50 kg skier leaves the top of a 10 m high frictionless slope (point "a") from rest and reaches the bottom of the slope (point "") with a speed v,. He subsequently continues sliding on level ground to a full stop to a point "c" due to friction (i.e. 0.2 on the level ground). a. Write an expression for the total mechanical energy of the skier at point "a". b. Write an expression for the total mechanical energy of the skier at point "b". c. Use the Work-Energy Theorem to determine the work done from point “b" to point “c".

SEE MORE QUESTIONS