Question

An object is moving along straight line with constant speed in the same direction then. Choose all correct statements
a) its average speed is equal to instantaneous speed
b) Its acceleration is zero
c) Its velocity is constant
d) Its speed is greater than magnitude of its velocity

Answer 1

Answer:

b It's acceleration is zero.

Explanation:

Suppose an object is moving with the speed of 2 km/hr in straight line in North direction..then

speed=2km/hr

direction =North

so,velocity=2km/hr in North direction(no change as compare to speed)

Now,

a=displacement/t

a=0/t

.............Thus,it's acceleration is zero .