Mechanics | Relativity Answers

two vectors of magnitudes 7 units and 15 units can never give resultant of?
a)7 units
b)11 units
c)13 units
d)-20 unit

A balloon is ascending vertically with a acceleration of 0.2m/s square .two stones are dropped from it at an interval of 2 sec. Find the distance between them 1.5 sec. After the second stone is released

A stone of mass 0.49 kg is accelerated upward at a rate of 1.5 m/s. What force is applied to make this happen,

A boy is running on a straight road .he runs 500m towards borth in 2.10 mins and then turns back and runs 200 m in 1 min .calculate
His average speed and magnitude of average velocity during first 2.10 mins
His average speed and magnitude of average velocity during the whole journey

with what velocity that a body projected up so that distances traveled by it in 5th and 6th second are equal?

a train passes an electric post in 10 second and a bridge of length 2 km in 110 seconds. the speed of the engine is?

a body goes from P to Q with a velocity 40 m/s and comes back with velocity of 60 m/s. what is the average velocity of the body during the journey ?

A balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 2.0 kg. Its volume is 5.0 m3. The density of air is 1.3 kg/m3

if a mass of a planet is 10% less than that of earth and the radius 20% greater than that of earth the acceleration due to gravity on the planet will be?

the period of a satellite in a circular orbit of radius R is T. The period of another satellite in a circular orbit of radius 4R is?