A boy cruising across a smooth, level sidewalk is approaching a pipe guard-rail. It seems like a good idea for him to jump over the rail and let the skateboard pass under the rail. The mass of the boy is 38.8 kg, the mass of the skateboard is 2.43 kg, the initial cruising speed is +5.22 m/s, and the instant after leaving contact with the board, the boy's velocity relative to the sidewalk is 5.33 m/s, 9.27° above the horizontal. If we ignore the force of friction between the skateboard and the sidewalk, determine the skateboard's velocity relative to the sidewalk at the instant the boy leaves the board. m/s

A boy cruising across a smooth, level sidewalk is approaching a pipe guard-rail. It seems like a good idea for him to jump over the rail and let the skateboard pass under the rail. The mass of the boy is 38.8 kg, the mass of the skateboard is 2.43 kg, the initial cruising speed is +5.22 m/s, and the instant after leaving contact with the board, the boy's velocity relative to the sidewalk is 5.33 m/s, 9.27° above the horizontal. If we ignore the force of friction between the skateboard and the sidewalk, determine the skateboard's velocity relative to the sidewalk at the instant the boy leaves the board. m/s

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A baseball with mass of 0.16 kg is batted into the air. Its initial speed is 37.7 m/s, directed at an angle 30 degrees above the horizontal. After 0.10 seconds, what is the horizontal component of the ball's velocity (in m/s)?
A skater of mass 72.5 kg initially moves in a straight line at a speed of 4.80 m/s. The skater approaches a child of mass 35.0 kg, whom he lifts on his shoulders. Assuming there are no external horizontal forces, what is the skater's final velocity?
A century-old platter falls vertically downward. Upon breaking, its fragments fly off parallel to the ground with velocity 1 = 2.4 m/s and V2 = 5.4 m/s. Find mass ml and mass m2 in kg Vi 25.0° V2 m1 m2 45.0°
To promote his new single “Itaktak Mo”, Joe decided to launch a satellite into orbit that will intercept allairwaves and play his song worldwide. To do this, he needs to mount his 100 [kg] satellite onto a 750 [kg]rocket. It blasts off vertically from a launch pad with a constant net upward acceleration of 3.80 [m/s2].When it has reached a height of 680 [m], the satellite was released, and the rocket blew up shortly after,due to a system failure. Assume that the satellite was not damaged after the explosion. A. What is the maximum height that the satellite will reach above the launch pad? B. How much time will elapse after system failure before the satellite comes crashing down the launchpad? C. How fast will the satellite be moving just before it crashes?
A 0.350 kg hammer is moving horizontally at 5.50 m/s when it strikes a nail and comes to rest after driving the nail 1.00 cm into a board. Assume constant acceleration of the hammer-nail pair. (a) Calculate the duration of the impact (in s). 0.036 (b) What was the average force (in N) exerted on the nail? (Enter the magnitude.) 52.9375 X N
A tennis ball of mass 57.0 g is held just above a basketball of mass 607 g. With their centers vertically aligned, both balls are released from rest at the same time, to fall through a distance of 1.40 m An illustration shows a tennis ball placed on top of a basketball with a downward-pointing arrow shown to the side. (a) Find the magnitude of the downward velocity with which the basketball reaches the ground. m/s(b) Assume that an elastic collision with the ground instantaneously reverses the velocity of the basketball while the tennis ball is still moving down. Next, the two balls meet in an elastic collision. To what height does the tennis ball rebound? m
V:00 a 46 For testing, a jetski coming in at 34.1 m/s collides with a tree and stops in around 1 second. A dummy passenger weighing 1481.3 N is protected by an airbagthat slows its velocity in 1.7 s. What is the magnitude of average force does the dummy experience during the collision? (N) Answer: 3028.86 The correct answer is: 3028.86
In a game of curling, a collision occurs between two stones of equal mass. The object stone is initially at rest. After the collision, the stone that is thrown hasa speed of 0.56m/s in some direction, represented by q. The object stone acquires a velocity vf2= 0.42m/s at an angle of f= 30.0o from the original direction of motion of the thrown stone. Determine the initial velocity of the thrown stone.
A car (VW) and a truck (C) collide inelastically (stick together). The impact is made in a very short time of t= 0.1 s. Initial speed Vvw=40.0 m/s Cv=30 m/s Masses mvw = 900.0 kg mc = 2000.0 kg Find the final velocity of the vehicles. Find the average acceleration of each vehicle Find the average force over each vehicle. Find the initial kinetic energy. Find the final kinetic energy.
A mass m₁ = 4.0 kg is suspended over a massless frictionless pulley and is attached with a. massless rope to a mass on a frictionless horizontal table, mt = 2.0 kg. This mass is itself attached to another suspended mass m2 = 6.0 kg again with a massless rope over a massless and frictionless pulley. (a) Find the velocity of each mass when m2 falls a distance 20. cm (the masses start at
A hockey puck (mass = 4 kg) leaves the players stick with a speed of 12 m/s and slides on the ice before coming to rest. The coefficient of friction between the puck and the ice is 0.3. How far will the puck slide after leaving the players stick?
The average thrust created by the first stage engine of a model rocket is 50N. The rocket has an average weight of 10N with a burn time of 2 seconds. The rocket is initially fired vertically upward. When the rocket reaches maximum height, a second engine is fired creating a horizontal velocity (only) of 50m/s. Where does the rocket land relative to its launch point? Assume it was launched on a horizontal plain.