Question

7. Jenny uses 50 N of force to accelerate a block at 25 m/s2, what is the mass of the block?

Answer 1

According to the Newton's second law, the vector sum of the forces on an object equals the product of the object's mass and its acceleration:

$F = ma$ .

Therefore, if Jenny uses 50 N (1N is 1 kg·m/s²) force to accelerate a block at 25 m/s², the mass of the block is:

$m=\frac{F}{a} = \frac{50 \text{ N}}{25 \text{ m/s}^2} = 2$ kg.

Answer: the mass of the block is 2 kg.