Advertisements
Advertisements
प्रश्न
A car moving on a straight path covers a distance of 1 km due east in 100 s. What is the speed of the car?
Advertisements
उत्तर
Speed of the car = Distance/time taken
= `(1 "km")/(100 "s") = "1000 m"/"100 s" = "10 m/s"`
APPEARS IN
संबंधित प्रश्न
What name is given to the speed in a specified direction ?
In addition to speed, what else should we know to predict the position of a moving body ?
A motorcyclist drives from place A to B with a uniform speed of 30 km h-1 and returns from place B to A with a uniform speed of 20 km h-1. Find his average speed.
The distance between Delhi and Agra is 200 km. A train travels the first 100 km at a speed of 50 km/h. How fast must the train travel the next 100 km, so as to average 70 km/h for the whole journey ?
A car is moving along a straight road at a steady speed. It travels 150 m in 5 seconds:
How far does it travel in 6 seconds ?
A car travels the first 30 km with a uniform speed of 60 km h−1 and the next 30 km with a uniform speed of 40 km h−1. Calculate :
- The total time of journey,
- The average speed of the car.
The velocity-time graph of a moving body is given below in Figure

Total displacement.
The velocity-time graph of a moving body is given below in Figure

Displacement in each part AB, BC and CD.
Define uniform velocity and give one example.
A speeding car changes its velocity from 108 kmh−1 to 36 kmh−1 in 4 s. Calculate its deceleration in
- ms−2
- kmh−2.
