Question

Subject: SCIENCE
Velocity (kmh)
1
1
2
2 3 4 5 6
Time (in hrs)
PHYSICS
Given along is a velocity - time graph for a moving body.
Find-(0) Velocity of body at pointC.
() Acceleration of body at pointA&B.
(11) Acceleration of body between point B&C.
Derive 3rd equation of motion graphically giving symbols of each quantity with
proper meaning.
Draw a graph for a situation-
(a) a cricket ball thrown vertically upward & returning to the hands of thrower.
(b) a trolley decelerating to a constant speed and then accelerating uniformly.
Give the difference between uniform velocity and non-uniform velocity.
From top of the building 160m high a ball is dropped and the same time a stone is
projected vertically upward from the ground with velocity of 40m/s. Find the time
when the ball and stone will meet.​

Answer 1

Answer:

Doubling one's speed would mean doubling one's distance traveled in a given amount of time. Doubling one's speed would also mean halving the time required to travel a given distance. If you know a little about mathematics, these statements are meaningful and useful. (The symbol v is used for speed because of the association between speed and velocity, which will be discussed shortly.)

Speed is directly proportional to distance when time is constant: v ∝ s (t constant)

Speed is inversely proportional to time when distance is constant: v ∝ ⅟t (s constant)