Question

how much force is needed to accelerate a trolley of mass 20 gram through 1 m per second square

Answer 1

According to Newton's 2nd law
$f = m \times a$

Answer 2

Hey Mate,

Here Is Your Answer

___________

Mass Of Trolley - 20 gram
=0.02 kg

Acceleration Of Trolley-1 m/s^2

Force=m×a
=0.02×1
=0.02 N

___________

Hope It Helps You.