Mechanics | Relativity Answers

Can an object be accelerated if it is moving with constant speed? If yes, give example.

assume that acceleration due to gravity is 10 m/s2 down 1) fine the magnitude and direction of the net force on an object given that the following forces act on the object at the same time. 20n east 10n down 30n west 50n down and 30n up

to a man walking due east at the rate of 2km/h ,rain drops to fall vertically and when he increase his speed to 4km/h ,it appears to meet him at 45degree find real direction and speed of rain?

range of a target is found to be 20km. A shell leaves a gun with a velocity of 500m/s. What must be the angle of elevation of the gun if the ground is level?

A 9500 boxcar traveling at 13.0 strikes a second boxcar at rest. The two stick together and move off with a speed of 4.5 . What is the mass of the second car?

during a hot air balloon ride the people were blown 50m north 625m west and50m south. what is the distance and the displacement of the balloon.

to a man walking due east at the rate of 2km/h ,rain drops to fall vertically and when he increase his speed to 4km/h ,it appears to meet him at 25degree find real direction and speed of rain?

A swimmer heads upstream towards the opposite bank of 200m wide channel in a direction which forms an angle of 60 degree with the bank.at what angle to the bank must the swimmer head in order to reach its destination if the velocity of the boat relative to water is 18km/hr and the flow-velocity of water in the channel is 0.5 m/s ?how long does it take for the swimmer to reach its destination ?for small angles ,it can be assumed that sinA=tanA=Aradian.

The magnitude of displacement of a particle moving in a circle of radius 'a' with constant angular speed ω varies with time 't' as :

(A) 2 a sin ωt
(B) 2 a sin ωt/2
(C) 2 a cos ωt
(D) 2 a cos ωt/2

Please do specify the method by which u got ur answer...

If an airplane travels a 3260 m path legnth while gaining 347 m in altitude, what is its angle of climb?