Advertisements
Advertisements
प्रश्न
A racehorse runs straight towards the north and covers 540 m in one minute. Calculate
- displacement of the horse,
- its velocity in (a) ms−1 (b) kmh−1.
Advertisements
उत्तर
A racehorse runs straight towards the north and covers 540 m in one minute.
(i) Displacement = 540 m − north
(ii) Time = 1 minute = 60 s
Velocity = `"Displacement"/"Time"`
v = `540/60` = 9 ms−1
v = `(9xx3600)/100` km/h = `324/10` km/h
v = 32.4 km/h or kmh−1
APPEARS IN
संबंधित प्रश्न
Which of the following is true for displacement?
- It cannot be zero.
- Its magnitude is greater than the distance travelled by the object.
An athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance covered and the displacement at the end of 2 minutes 20 s?
State whether distance is a scalar or a vector quantity.
When brakes are applied to a bus, retardation produced is 25 cm s-2 and the bus takes 20 s to stop. Calculate -
- The initial velocity of the bus
- The distance travelled by bus during this time.
Can you suggest the kind of motion of a body from the following distance – time graph?
Write the SI units for measurement of distance and displacement.
The shortest distance between two places is ______.
______ is the length of the actual path covered by a body.
A particle is moving in a circular pattern of radius r. The displacement after half a circle would be ______.
Displacement is the ______ distance covered by a body.
