A bus decreases its speed from
80 km h–1 to 60 km h–1 in 5 s.
Find the acceleration of the bus.
During an experiment, a signal
from a spaceship reached the
ground station in five minutes.
What was the distance of the
spaceship from the ground
station? The signal travels at the
speed of light, that is, 3 × 108
m s–1
Under what condition(s) is the
magnitude of average velocity of
an object equal to its average
speed?
Which of the following is true for
displacement?
(a) It cannot be zero.
(b) Its magnitude is greater than
the distance travelled by the
object
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