A 72-kg boy is surfing and catches a wave which gives him an initial speed of...
a)A 74-kg boy is surfing and catches a wave which gives him an initial speed of 1.6 m/s. He then drops through a height of 1.59 m, and ends with a speed of 8.5 m/s. How much nonconservative work (in kJ) was done on the boy? kJ
A 68-kg boy is surfing and catches a wave which gives him an initial speed of 1.6 m/s. He then drops through a height of 1.64 m, and ends with a speed of 8.5 m/s. How much nonconservative work (in kJ) was done on the boy?
To throw a curve ball, a pitcher gives the ball an initial angular speed of 36 rad/sec. When the catcher gloves the ball 0.595 sec later, it had an average angular deceleration of 0.3 rad/sec^2. What is ball's angular velocity when the catcher catches the ball? How many revolutions does the ball make before being caught? A 500 kg elevator moves upward with acceleration of 2 m/sec^2 though a vertical distance of 25 m. How much work was done by...
The boy of mass 45 kg is sliding down the spiral slide at a constant speed such that his position, measured from the top of the chute, has components r 1 t) rad, and z = (-0.51) m, where t is in seconds (Figure 1) Part A .5m, (0.8 Determine the components of force Fr, F, and Fz which the slide exerts on him at the instar t 2 s. Neglect the size of the boy Express your answers using...
Two carts mounted on an air track are moving toward one another. Cart 1 has a speed of 0.8 m/s and a mass of 0.53 kg. Cart 2 has a mass of 0.71 kg. (a) If the total momentum of the system is to be zero, what is the initial speed of Cart 2 in meters per second? m/s (b) Does It follow that the kinetic energy of the system is also zero since the momentum of the system is...
please help with both parts and i will rate! im just not sure what im doing wrong in second part if anyone could help there too. thanks so so much! As shown in the figure below, object mi 65 kg starts at an initial height hi J 345 m and speed v1r 4.00 m swings downward and strikes (in an elastic collision) object m2 4.60 kg which is initially at rest. Determine the follow ng Kay speed of m, just...
A 0.400 kg hammer is moving horizontally at 7.50 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. (a) Calculate the duration of the impact. (b) What was the average force exerted on the nail? Additional Materials Reading 12. -12 points OSColPhys1 8.P.002.WA. Two carts mounted on an air track are moving toward one another. Cart 1 has a speed of 0.8 m/s and a mass of 0.53 kg. Cart 2...
TR PROBLEMS: Show your 1. A 1800 Kg car moves around a flat circular road of radius R- 100 m friction available between the tire and the road is 10368 N. Calculate (A) car can have so that it does not get out of the curve (B) the time alLoroblems radius R-100 m. The maximum amount ef (C) the new radius of the bigger circle the car moves on if it moves at a higher s the maxinmum speed the...
question 4-7 4. Travelling Waves and Their Characteristics A rope wave travels in the positive x -direction. You are also told that the speed of the wave is 1000 cm/s, its frequency is 200 Hz, and that the wave is subject to the following initial conditions: at x 0 and t = 0: y =-1 cm, and, at x = 0 and t : ar = +20 cm/s (this is the velocity of the point on the rope at horizontal...