Question

what net force is needed to accelerate a car at a rate of 1500 m/s² if the car has a mass of 2250 kg?
3375 n
0.00067 n
34 n
1500 n
question #4
you are trying to move three different boxes. box a has a mass of 30 kg, box b has a mass of 20 kg, and box c has a mass of 10 kg. if you push the boxes at the same rate, which box will require more force?
they all require the same force
box b
box c
box a

Explanation:

Step1: Recall Newton's second - law formula

$F = ma$, where $F$ is force, $m$ is mass and $a$ is acceleration.

Step2: Substitute given values for the car problem

Given $m = 2250\ kg$ and $a=1.500\ m/s^{2}$, then $F=(2250\ kg)\times(1.500\ m/s^{2}) = 3375\ N$.

Step3: Analyze the box - pushing problem using Newton's second - law

Since $F = ma$ and the acceleration $a$ is the same for all boxes, the box with the largest mass will require the most force. Box A has a mass of $30\ kg$, box B has a mass of $20\ kg$ and box C has a mass of $10\ kg$. So box A requires more force.

Answer:

1. A. 3375 N
2. D. Box A