﻿ a car moves with a speed of 40 km per hour for the first hour and then with a speed of 60 km per hour for next half hour and final  , 17.10.2019 23:00, nitesh3786

# a car moves with a speed of 40 km per hour for the first hour and then with a speed of 60 km per hour for next half hour and final with a speed of 30 km per hour for the next 1.5 hours calculate the average speed of a car   ### Other questions on the subject: Physics Physics, 16.08.2019 19:00, sahini99
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In the system shown, the block a of mass 4m is held at rest by a horizontal pull f. the block b is of mass m.surfaces in contact are frictionless. when the force f is removed, the block of mass 4m acquires accelerationwhich of the following statements is/are true? (a) when a is held at rest, magnitude of force f has to be 3mg.(b) when a is held at rest, normal contact force from ground on block a is 5mg.terwhen f is removed, acceleration of the block b with respect to a is 2a.d) when f is removed, normal contact force between block a and b is ma.​
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a car moves with a speed of 40 km per hour for the first hour and then with a speed of 60 km per hou...

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