Question

5. A 1052 kg truck, starting from rest, reaches a speed of 20.0 m/s in 6.20 s.

Answer 1

Answer:

a. 3,392.7 N

b. 3,392.7 N

Explanation:

We are given the following information;

• Mass of the truck as 1052 kg
• initial speed as 0 m/s
• Final speed as 20.0 m/s
• Time taken as 6.20 s

#a. We are required to calculate the acceleration;

We need to know the formula of getting acceleration;

a = (v-u)/t

Where v is the final velocity, u is the initial velocity

Therefore;

a = (20 m/s - 0 m/s)/6.20s

= 3.225 m/s²

Thus, the average acceleration of the truck is 3.225 m/s²

#b. We are required to calculate the net force on the truck

We need to know that;

According to the second Newton's law of motion, F=ma

Where F is the net force, m is the mass and a is the acceleration.

Therefore;

Net force, F = mass × Acceleration

                    = 1052 kg × 3.225 m/s²

                    = 3,392.7 N

Thus, the net force on the truck is 3,392.7 N