The velocity of a particle at an instant is 10 ms⁻¹.After 3 s its velocity will become

The velocity of a particle at an instant is 10 ms⁻¹.After 3 s its velocity will become 16 ms⁻¹.The velocity at 2 s before the given instant, will be

Options

(a) 6 ms⁻¹
(b) 4 ms⁻¹
(c) 2 ms⁻¹
(d) 1 ms⁻¹

Correct Answer:

6 ms⁻¹

Explanation:

Given: v=16 ms⁻¹;u=10 ms⁻¹;t= 3s; a=?
v=u+at
16=10+a(3)
3a=16-10⇒3a=6⇒a=2 ms⁻²
before 2 s,⇒10=u+2×2⇒u=6 ms⁻¹.

admin:

Related Questions

  1. A beaker of radius 1.5 cm is filled with a liquid of surface tension 0.075 N/m
  2. A parallel plate air capacitor of capacitance C is connected to a cell of emf
  3. The drift velocity of the electrons in a copper wire of length 2 m under
  4. If two soap bubbles of different radii are connected by a tube
  5. The product of pressure and volume hve thesame units as the product of