Advertisements
Advertisements
प्रश्न
A car covers 90 km in `1 1/2` hours towards east. Calculate
- displacement of car,
- its velocity in (a) kmh−1 (b) ms−1.
उत्तर
(i) A car covers 90 km in `1 1/2` hour i.e. `3/2` hour towards east.
∴ Displacement = 90 km − east
(ii) Time = `1 1/2` hour = `3/2` hour
Velocity = `"Displacement"/"Time"`
v = `90/(3//2)`
v = `(90xx2)/3` = 60 km/h
v = `60xx1000/3600` m/s
v = `100/6` m/s = 16.67 ms−1
APPEARS IN
संबंधित प्रश्न
Is displacement a scalar quantity ?
An ant travels a distance of 8 cm from P to Q and then moves a distance of 6 cm at right angles to PQ. Find its resultant displacement.
Complete a sentence and explain it.
The minimum distance between the start and finish points of the motion of an object is called the ______ of the object.
Draw a velocity-time graph for a body moving with an initial velocity u and uniform acceleration a. Use this graph to find the distance travelled by the body in time t.
A bird sitting on a wire, flies, circles around and comes back to its perch. Explain the total distance it traversed during its flight and its eventual displacement.
Define Distance.
Can you suggest the kind of motion of a body from the following distance – time graph?
Can a body have negative displacement?
Name the physical quantity associated with the rate of change of displacement with time.
Exercise Problems.
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 m and 20 s?
