Question

What is the acceleration
of a body moving
with uniform
velocity?​

Answer 1

• Acceleration = 0 m/s²

Because , here given that the body is moving with uniform velocity . So , as we know that v = u + at simplifying → a = v - u / t , that means initial velocity - final velocity divided by time . So , here initial velocity - final velocity ( v - u ) means change in velocity , since here the body is moving uniform velocity change in velocity [ ( v - u ) or ∆v ] will be zero .

⇒ a = ∆v/t

Substituting ∆v = 0

⇒ a = 0/t

⇒ Acceleration = 0 m/s²

Hence , acceleration of a body which is moving with a uniform velocity = 0 m/s²

Answer 2

Answer : -

Define Uniform Acceleration?

• Uniform acceleration means that the change in velocity per unit of tine is always the same in terms of magnitude and direction.

What is the acceleration of a body moving with uniform   velocity?

• Since acceleration is rate of change of velocity over time,a body moving with uniform velocity will have 0 acceleration.

a = dv/dt

For uniform velocity dv = 0

Hence a =0 m/s²

Acceleration of a body moving with uniform velocity is zero

A particle moves over three quarters of a circle of radius r. What is the magnitude of its  displacement?

Radius of circle = r

Body moves over 3 quarters

Magnitude of displacement = the hypotenuse of the 4th quarter whose Base and perpendicular r both = r unit.

Then,

(Hypotenuse)² = base² +perpendicular²

H² = r² + r²

H^2 = 2r²  

H =√2r

The magnitude of its displacement √2r