Last seen: Nov 14, 2021
(a) Acceleration = a = (b) u = 0 m/s v = 21 m/s Time, t = 1 min = 60 sec a = a = a = = 0.35 m/s2
Speed of athelete = 10 m/s Speed of bicycle = 200 m/min = m/s = 3.33 m/s Speed of scooter = 30 km/h = m/s = 8.33 m/s 3.33 m/s <...
For bus X, Speed = Speed = = 72km/h For bus Y, Speed = Speed = = 68 km/h Speed of bus X is more than that of bus Y. Hence, ...
Speed is a scalar quantity as it has magnitude only, it has no specified direction.
A freely falling body has non-uniform motion because it covers smaller distances in the initial ‘1 second’ intervals and larger distances in the later...
(a) vector, scalar (b) velocity (c) acceleration, second, velocity, 3m/s (d) displacement, m/s (e) velocity, m/s2
S.I. unit of retardation is m/s2.
Uniformly accelerated motion
(a) Speed (or Velocity) (b) Acceleration
Negative acceleration is also called retardation.
When a body is moving with uniform velocity, its acceleration is zero.
Motion of a boy from his home to shop (in one direction) and back to home (in its reverse direction) is an example of a situation in which a body has ...
Average velocity of a moving body can be zero.
When the object moves in a single straight line, the magnitude of average velocity equal to average speed.
When a body covers equal distances in equal intervals of time in a particular direction however small or big the time interval may be, the object is s...
In addition to speed, we should know the direction in which the body is moving.
When the body comes back to its starting point, it has zero resultant displacement but covers a certain non-zero distance.
Speed gives an idea of how slow or fast a body is moving.
(a) The speedometer of a car measures instantaneous speed of the car. (b) Odometer is a device used to record the distance travelled by the car.
Speed is defined as the distance travelled per unit time.