Mechanics | Relativity Answers

A jet aircraft is traveling at 295 m/s in horizontal flight. The engine takes in air at a
rate of 97.8 kg/s and burns fuel at a rate of
3.75 kg/s. The exhaust gases are ejected at
709 m/s relative to the aircraft.
Find the thrust of the jet engine.
Answer in units of N.
Don't round answer.

A neutron in a reactor makes an elastic headon collision with the nucleus of an atom initially at rest.
Assume: The mass of the atomic nucleus is
about 11.1 the mass of the neutron.
What fraction of the neutron’s kinetic energy is transferred to the atomic nucleus?
Don't round answer.

Let's say that a small block of mass is released from rest at the top on a frictionless wedge. The wedge is also on a frictionless surface. We know the values of the masses and the final velocity of the small block. Due to the conservation of momentum, the wedge moves in the opposite direction (P=0 before and there is no external force) and we can find the velocity of the wedge at the end. The question is to find the height of the wedge (the height at which the block was released).
1-Do we need to take the total final kinetic energy including the kinetic energy of the wedge to find the initial potential energy or only the final k.e. of the block that slid down?
2-How exactly does the wedge gain energy?

We launch a 15kg block up and inclined plane forming an angle of 37 degrees with the horizontal. The block moves a distance of 3.0 on the plane before stopping.the coefficient of friction force between the block and the plane is 0.25 calculate:
a) the increase of potential energy of the block
b) the work done by the force of friction
c) the starting speed of the block
d) the speed of the block when it comes to its point of departure, descending.

what is the kinetic energy of the continent

A sled is being pulled across a horizontal patch of snow. Friction is negligible. The pulling force points in the same direction as the sled's displacement, which is along the +x axis. As a result, the kinetic energy of the sled increases by 36.8 percent. By what percentage would the sled's kinetic energy have increased if this force had pointed 66.3 ° above the +x axis?

The amount of energy needed to power a 0.10-kW bulb for one minute would be just sufficient to lift a 1.0-kg object through a vertical distance of

An arrow of Mass 0.3kg is fired with a velocity of 10m/s into a wooden block if mass 0.7kg.Calculate the final kinetic energy after impact, given that the wooden block can freely move

an object X was drop from a height 15.28m above the ground. just as that time, an object Y was short vertically up from the ground with a velocity of 18m/s.object X fell through a distance of 3.6m and meet object Y.
a. calculate the velocity of the two bodies when they meet
b. Calculate when the two bodies meet