Mechanics | Relativity Answers

Two trains start at the same time from Delhi and Jalandhar, distance of 400 km, travelling, one at the rate of 48 km/hr and the other at 72 km/hr. Where will they meet and in what time from starting.

Which fell faster, the open sheet of paper or the crumpled paper? Why?

Calculate the force needed to accelerate a 50-kg boy at a rate of 10 m/s2

A particle moves from origin in xy plane with velocuty 3i+6xj find the equation if the path

why is reynolds number defining the different flows givesn different values in different books and internet pages?

A boy throws a ball vertically up wards with a velocity of 25 m/s while he was standing on a cliff on the way down it just misses the thrower and falls down on the ground if the height of the building was 49 m. Determine
a) the total time of flight?
b) the velocity which with it reaches the ground?

a train starts from rest and accelerates uniformly for 30 minutes and attains a velocity of 700 m/s . it then continuous its motion with constant velocity for 2 hours .after then brakes were applied and it comes to rest in 20 minutes ,30 seconds.calculate the total distance travelled by the train during this journey?

how much force is applied if a van which is 2500kg.Gains a speed of 12.0m/s after 6 seconds starting from rest

if the gravitational force between two objects is proportional to 1/R (and not to 1/R^2) where R is the separation between them, then particle in circular orbit under such force would have its orbital speed v proportional to?
OPTIONS
a)1/R^2
b)R
C)R^1
d)1/R

A player kicks a soccer ball towards the goalkeeper, but at an angle of 37 degree to the horizontal and with an initial speed of 14.7m/s The goalkeeper stands 26 m from the kicker. where will the ball land relative to the goalkeeper??