A block of mass m and a block of mass 3m are used to sandwich a massless spring with spring constant k. The blocks are not connected to the spring. Initially the blocks are at rort surfoge

A child of mass m falls from a height h onto the center of a trampoline, sinking to a depth y before being rebounded upwards. What is the maximum height can they reach?

A car's bumper is designed to withstand a 3.60 km/h (1.0 m/s) collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force (in N) on a bumper that collapses 0.225 m while bringing a 820 kg car to rest from an initial speed of 1.0 m/s.

A Hooke's law spring is compressed a distance d and is used to launch a particle of mass m vertically to a height h above its starting position. Under double the compression, the spring is now used to launch a particle of mass 2m. How high does the second mass rise above its starting position?

A car’s bumper is designed to withstand a 25.65 m/s collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force (in unit of N) on a bumper that collapses 0.12 m while bringing a 1,775.97-kg car to rest from an initial speed of 25.65 m/s. Your answer could be a large number between several thousands to hundreds of thousands. Just put in the raw number, for example, 123456.7

A ball of unknown mass m is tossed straight up with initial speed v. At the moment it is released, the ball is a height h above a spring-mounted platform, as shown in the figure. The ball rises, peaks, and falls back toward the platform, ultimately compressing the spring a maximum distance d from its relaxed position. Assume that the spring is perfectly ideal, with spring constant k, and that the mass of the spring and platform is negligible. What is the mass of the ball, m, assuming that there is no friction or air resistance? Using g to represent the acceleration due to gravity, enter an expression for m in terms of g, h, d, k, and v. kg m = m h www d

A ball of mass m is thrown from ground level with initial horizontal velocity component Vox and initial vertical velocity component Voy and returns to ground level. Neglecting friction, write expressions for (a) The largest kinetic energy of the ball during its flight; (b) The smallest kinetic energy of the ball during its flight.

(a) A rocket-powered car weighs 1200 kg. Its rocket engine loses thrust as time t increases, so that the force generated is given by F = 500 VE N. Given that the car starts from rest, find an expression for the car's velocity as a function of time. (b) How long will the car take to travel 1 km? (c) How fast will the car be travelling as it passes the 1 km mark? (d) What is the power being transfered by the rocket as it passes the 1 km mark? (e) Evaluate the work done by the rocket engine during the first kilometre.

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If you have an object moving along a rough surface (one in which kinetic friction is a significant contributor) then kinetic energy will be conserved. True O False