First slide

Second law

Question

A 5 kg weight is accelerated from rest to 60 m/s in 1 sec. What force acts on it?

Easy

A

5 x 60 N
B

(5/60) x e81 N
C

60² x 52 N
D

(5/2) x 60² x 981 N

Solution

$F = ma = m (\frac{Δv}{Δt}) = 5 (\frac{60}{1}) = 5 \times 60 N$

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