Question

An object moves along a straight line with an
acceleration of 2m/s . IF ITS INTIAL SPEED IS 10 m/s , what will be its speed 2 sec later.​

Answer 1

Explanation:

ANSWER

a=2m/s

u=10 m/s,t=5 sec

v=u+at

v= 10+2×5

v=20m/sec

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Answer 2

Answer:

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If an object moves along a straight line with an acceleration of 2m/s^2, what will be it's speed 2 seconds later?

The final speed depends upon the magnitude and direction of the initial velocity — neither of which are specified in the question.

• The velocity will increase by 4m/s in the direction of acceleration direction, so if the initial velocity was -4m/s in that direction, then the final velocity and speed will be zero.

• If the acceleration is in some direction other than the line along which it was moving, then the initial velocities in directions orthogonal to the straight line will remain unaffected, and the final speed will be the magnitude of the vector sum of all three components.

==>> If it was initially moving along the same line at a velocity at or near the speed of light, then the acceleration of 2m/s/s will have little or no effect.

==>> Now, if the object was initially at rest, then its speed (after 2 seconds of acceleration at 2m/s/s) will be 4m/s.