Mechanics | Relativity Answers

The two ends of a trai. Moving with uniform acceleration pass a certain point with velocity u and v .find velocity with which the middle point of the train pass the we point

A body of mass 30 kg kept on a rough horizontal surface of coefficient of friction is 0.3 then frictional force between block and the surface is

Jacob and Sophia are playing with a merry-go-round on a playground.
The merry-go-round can be modeled as a flat disk with mass M = 223.0
kg and radius R = 3.3 m that freely rotates horizontally without friction
about its center axis. When the merry-go-round is already spinning at
23 rotations per minute, Jacob exerts a constant force FJ = 12.3 N
tangent to the outer edge of the merry go round in the direction of the
merry-go-round’s rotation. At the same time Sophia puts her foot at
a distance r = 3.1 m from the center, which exerts a constant force of
friction FS = 21.2 N. How long will it take for the merry-go-round to
come to a stop?

A plane is flying at 300km/h [S 39 E]. The wind is blowing at 60 km/h [N 75 E]. What is the velocity of the plane relative to the ground?

Two bodies A and B of equal masses moving with velocities (10km/s, 030 °) and (15km/s,090°) impigne and coalesce. Find the initial velocity with which the composite body begins to move immediately after collision

The viscous charge F between two layers of liquid with specific area of contact A in a region of velocity gradient dv/dt is given by F = integration sign A dv ÷dt where the constant is the cofficient of the viscosity .what is the dimension of the constant.

A car traveled 20 km to the east, then it moved back 10 km to the west. And finally, it traveled 50 km to the east. what is the car total displacement? *

An iron cube of mass 480g and density 8g/cm³ is suspended by a string so that its half submerged into oil of density 0.8g/cm³ . Find tension on the string

The object of mass m shown above is dropped from rest near Earth’s surface and experiences a resistive force of magnitude kv , where v is the speed of the object and k is a constant. Which of the following expressions can be used to find v as a function of time t ? (Assume that the direction of the gravitational force is positive.)

Would you rather catch an egg over a long period of time or short period of time? Explain your answer using impulse