Mechanics | Relativity Answers

the acceleration of a particle is increasing with time t as bt. the particle starts from origin with an initial velocity v. what is the distance travelled by the particle in time t.

what is the speed of car if velocity is zero?

at what speed necessary to throw up a bricks to cast 3 bricks before returning of casted earlier? it is impossible to throw more than 2 bricks per second.

A body has speed V, 2V and 3V in the first 1/3 second 1/3, second 1/3 and the remaining 1/3 of the total ditance respectively its average speed is

A 3-kg on an inclined plane of angle 30 degrees is connected by a cord over a frictionless pulley to a second load which has a mass of 2 kg. What is the acceleration of each load? What is the tension on the cord?

A skydiver of mass m jumps from an aircraft and falls towards the ground. There are two principal forces acting upon her: gravity mg pulling her down and air resistance slowing her fall. Assume that the upward force of air resistance is proportional to the
square of her speed v, so that we can write air resistance as equal to kv2, where k is a constant independent of v. Thus, the faster she falls, the greater the air resistance.
(a) (12 marks) After the skydiver has been falling for some time, air resistance brings her acceleration to zero, so that she is now falling at constant speed u. Derive a
formula for u in terms of m, g and k.
(b) (8 marks) Derive the dimensions of the constant k in terms the fundamental dimensions of mass M, length L and time t

what is resolution of vectors? Explain me with diagram.

a vehicle of mass 120kg is moving with a velocity of 90kmph what fore should be applied on the vehicle to stop it in 5 s

what is tearing strain

A car of mass 1000 kg is moving with a constant speed of 20 m/s on a straight horizontal road with an output power of 20 kW. I f the output power is suddenly increased to 60 kW, what is the acceleration of thecar at this instant?