(a) The graph below plots the position versus time for an object moving in one d

Question

(a) The graph below plots the position versus time for an object moving in one dimension along the x direction. x (m) r (s) What is the speed (magnitude of velocity) of the object at t 2.5 s? m/s What direction is the object moving along that time? O The object is not moving What is the acceleration of the object at t 2.5 s? (Indicate the direction with the sign of your answer m/'s2 is the speed increasing, decreasing or constant at that time? increasing O decreasing O constant (b) The graph below plots the velocity versus time for an object, diffenent from the one in part (a), moving in one dimension along the x direction (m/s) r (s) What is the speed (magnitude of velocity) of the object at t 2.5s m/s What direction is the object moving along that time interval? The object is not moving What is the acceleration of the object at t 2.5 s? (Indicate the direction with the sign of your answer.) m/s Is the speed increasing, decreasing or constant at that time? increasing decreasing O constant

Explanation / Answer

a) v= (2-10)/(4-1)= 2.67 m/s

Directed along - x axis

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As the velocity is constant so acceleration must be 0.

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Velocity is neither increasing nor decreasing

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b)

Velocity at t=2.5 s

V= 6 m/s

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Object is moving along - x axis

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a= (2-10)/(4-1)= 2.67m/s^2

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Speed is decreasing

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Comment in case any doubt . Goodluck

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