If a particle is accelerating, it is either speeding up or speeding down. Do you agree with this statement?

No. An accelerating particle does not necessarily speed up or speed down. Acceleration is the rate of change of velocity. The change of velocity means that there is either change of speed or change of direction or both. Even if the speed is constant, the change of direction can give acceleration.

[Read: Motion in a Straight Line]

For example, a particle moving with constant speed $v$ in a circular path of radius $r$ has a centripetal acceleration $a_c$ towards the centre given by \[a_c=\frac{v^2}{r}\]

[Read: Circular Motion]

Is it possible that acceleration of a body is in one direction with motion in two directions?

A body when thrown upwards with a certain velocity requires certain time to reach the maximum height. If the velocity is doubled, what is the time required to reach the highest point?

A hunter fires a bullet directly towards a monkey sitting at a distant tree. At the instant, the bullet leaves the barrel, the monkey drops. Will the bullet hit the monkey?

Graphical Representation of Uniform Velocity

Can a body have velocity but zero acceleration?

Two bodies of different masses are dropped from same height. Compare their velocities on reaching the ground and the time required.

A player hits a baseball at some angle. The ball goes high up in space. The player runs and catches the ball before it hits the ground. Which of the two (the player or the ball) has greater displacement?

SIMILAR QUESTIONS

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