Mechanics | Relativity Answers

can i apply law of conservation of linear momentum when objects collide and there is friction from the road.

what happens toour weight when earth spin faster and what happens when it stop and why?

why centrifugal force is zero at pole region and maximum at equator?

The normal duration of isc physics practical period in indian colleges is 100 minutes. express this period in micro centuries. 1 microcentury=10^-6*100yrs. how many microcenturis did you sleep yesterday.

a speedboat moving at 30.0 m/s approaches a no-wake buoy marker 100 m ahead. the pilot slows the boat with a constant acceleration of -3.50 m/s^2 by reducing the throttle. (a) how long does it take the boat to reach the buoy? (b) what is the velocity of the boat when it reaches the buoy?

A hollow sphere and a solid sphere both having the same mass of 5 kg and radius 10 m are initially at rest.If they are made to roll down the same inclined plane without slipping ,what will be the ratio of their speeds when they reach the bottom of plane?

A trolley of mass 20 kg carries 16 kg grain and moves on a horizontal smooth and straight track at 20m/s.If the grain starts leaking out of a hole at the bottom at time t=0 s at the rate of .5 kg/s,what will be the speed of trolley at t=22s?

an 11.7 kg object is at rest on a perfectly frictionless surface when it is struck head on by a 3.9 kg object moving at 18 m/s. if the collision is perfectly elastic, what is the speed of the 11.7 kg object?

a truck is moving forward at a constant speed of 21m/s. the driver sees a stationery car directly ahead at a distance of 110m. after a reaction time of delta t he applies the brakes, which gives the truck an acceleration of -3m/s*s a)what is the maximum allowable delta t to avoid collision and what distance will the truck have moved before the brakes take hold ? b0 assuming a reaction of time of 1.4 sec show far behind the car will the truck stop, and in how many seconds from the time the driver first saw the car?

in what time would a body acquire a velocity of 270m/h if it was started with a velocity of 2cm/s and moved with an acceleration of 1/2 cm/s*s ?find the average velocity of the body for its motion during this period in two ways by using (i) the initial and final velocity of the body and (ii)the initial velocity,the acceleration and time?