Classical Mechanics Answers

A bullet of mass 0.0 12 kg and horizontal speed 70 m s1 ? strikes a block of wood of 0.4 kg and instantly comes to rest with respect to the block. T he block is mass suspended from the ceiling by means of thin wires. Calculate the height to which the block rises.

A man sits in a cannon barrel and lights the fuse. A force of 6000N propels him out of the barrel (which is 2.5m long) in 0.35s. The man has a mass of 85kg. What is the man’s velocity as he leaves the cannon?

A trolley of mass 200 kg moves with a unifo s1 rm speed of 36 km/h on a frictionless track. speed A child of mass 20 kg runs on the trolley from one end to the other (10 m away) with a of 4 m relative to the trolley in a direction opposite to the its motion, and the trolley. i. What is th ii. e final speed of the trolley ? How much has the trolley moved from t jumps out of he time the child begins to run

At a distance H above the surface of a planet, the true weight of a remote probe is eight percent less than its true weight on the surface. The radius of the planet is R. Find the ratio H/R.
H
R
=
1.24

How do you say a vehicle of mass 3000 0 0 moving with a velocity of 15 m per second at the degree of 90° right with another vehicle of mass 400000 m moving with a velocity of 12 metre per second at a degree of 120 degree calculate the magnitude and direction of the common velocity with which the velocity begins to move immediately after

Which has a greater velocity at the equilibrium position?
a. A 1kg mass attached to a spring of K=100N/m in horizontal frictionless
surface after releasing it from a compression of 10cm.
b. A 1kg mass oscillating on a concave-upward smooth surface with an
effective vertical height of 5cm.
c. A pendulum bob of mass 1kg displaced through a vertical height of 10cm.
d. All of these could not be compared.

1.If K is a positive constant of the following expression represents simple harmonic
motion (x is the displacement of particle from mean position)
a. Acceleration = kx
b. acceleration = kx2
c. Acceleration =-kx
d. acceleration = –kx2
2.If k and a are the positive constants and x is the displacement from equilibrium
position of the following expression represents SHM.
a. Velocity = k(a2– x2)
b. Velocity = √k(x2– a2)
c. Velocity = √k(a2– x2)
d. Velocity = k(x2– a2)

A racing car starts from rest at the point A and moves with constant acceleration of 11ms-2 for 8s. The velocity it has reached after 8s is then maintained for T s. The racing car then decelerates from this velocity to 40ms-1, into a further 2s reaching point B. Given that the distance between A and B is 1404, find value of T

Please see this image ----https://www.dropbox.com/s/4zlk239kx8wbgqa/20191011_105927.jpg?dl=0
I can not put the image in here, so I created the dropbox link and thanks in advance for your help :)

a pole support bby steel wire is in the way of construction site.in order to move heavy machines the steel wire must be moved 4m closer to the pole if the pole height is 30m and cable is currently fastened to the ground 12m from the pole how much steel wire need to cut off from the cable when they move it