Can you help me with this answer?

Question

A particle with mass m = 1.67 x 10 -27 kg is being accelerated along a straight line at 3.6 x 10 15
m/s 2 . If the particle has initial speed of 2.4 x 10 7 m/s and travels a distance of 2.8 cm, what then
is (a) its final speed and (b) the increase in its kinetic energy?

Answer 1

(a)

Use the kinematic relation

v_f² - v_i² = 2ad ⇒

v_f = √(2ad + v_i²)

You were given values for a, d, and v_i. Plug them into the equation and get v_f. Be careful with the units.

(b)

ΔE = (m/2)(v_f² - v_i²)

You were given m and v_i, and you got v_f in part (a). Plug in the numbers and get ΔE.