Question

A particle of mass 1 kg is moving along straight line with initial

velocity 5 m/s. The force acting on particle is changing with time

according to given force time graph. The velocity of particle at

t = 20 sec is if you love physics you can do this​

Answer 1

Answer:

What would you like to ask?

11th

Physics

Motion in a Straight Line

Acceleration

The net force acting on a p...

PHYSICS

avatar

Asked on December 20, 2019 by

Sharan Santhanam

The net force acting on a particle moving along a straight line varies with time as shown in the diagram. Force is parallel to velocity. Which of the following graph is best representative of its speed with time? (Initial velocity of the particle is zero).

117669

MEDIUM

Share

Study later

ANSWER

a=

m

F

or aαF

Hence, a-t graph is similar to F-t graph

From O to t

1

a∝t

or a=kt(k→ a positive constant)

Integrating we get,

v=

2

kt

2

or v∝t

2

i.e., v-t graph is a parabola passing through origin.

and facing up.

From t

1

to t

2

again acceleration is positive (in the direction of velocity). So, velocity will further increase.

solution