Advertisements
Advertisements
प्रश्न
A car is moving on a straight road with uniform acceleration. The speed of the car varies with time as follows :
Time (s) : 0 2 4 6 8 10
Speed (m/s) : 4 8 12 16 20 24
Draw the speed-time graph by choosing a convenient scale. From this graph :
(1) Calculate the acceleration of the car.
(2) Calculate the distance travelled by the car in 10 seconds.
Advertisements
उत्तर
We have a velocity-time graph of a moving particle.
(i) We have to find the acceleration from the given graph.
Acceleration = slope of line
= `((12-4))/((4-0)) "m/s"^2 = 2 "m/s"^2`
(ii) Distance travelled by the car is given by the area enclosed by the curve.
s = `"(Sum of parallel sides)(Height)"/2`
= `((4+24)(10))/2` m
= 140 m
APPEARS IN
संबंधित प्रश्न
What is the Differnece between speed and velocity ?
What does the odometer of an automobile measure?
Name the physical quantity which gives us an idea of how slow or fast a body is moving.
What is the SI unit of retardation ?
Arrange the following speed in increasing order (keeping the least speed first):
An athlete running with a speed of 10 m/s.
The tip of seconds’ hand of a dock takes 60 seconds to move once on the circular dial of the clock. If the radius of the dial of the clock be 10.5 cm, calculate the speed of the tip of the seconds’ hand of the clock. `("Given" π= 22/7)`.
One of the following is not a vector quantity. This one is :
The velocity-time graph of a moving body is given below in Figure
Total displacement.
Write down the type of motion of a body along with the A – O – B of the following distance – time graph.
Give two examples of uniform circular motion from your daily life.
