an object with an accoleration of 20m/s will __________________. a. change its velocity by 20m/s in 1 min. b. move 20 meters in 1 sec. c. move 200 meters in 10 seconds d. have a velocity of 200 m/s after 10 seconds
an object with an accoleration of 20m/s will __________________.
a. change its velocity by 20m/s in 1 min.
b. move 20 meters in 1 sec.
c. move 200 meters in 10 seconds
d. have a velocity of 200 m/s after 10 seconds
The rate of change of velocity is known as acceleration.
Consider the initial velocity of the object is zero.
(a)
The change in its velocity by 20 m/s in 1 sec not in 1 min.
Hence, option (a) is incorrect.
(b)
The object will move 20 m in 1 sec only in 1st second when the initial velocity of the object is zero. The will move different distance in 2nd second
Hence option (b) is incorrect.
(c)
Calculate the distance travelled in 10 sec.
d= ut + 0.5*a*t2
= 0 + 0.5*20*102
= 1000 m
Hence, option (c) is incorrect.
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