Question

At a college homecoming 20 students lifted a sports car. Each student exerted 450N of upward force on the car. a) What is the mass of the car in kg? b) What is its weight in lbs?

Answer 1

Answer:

(a) 918.37 kg

(b) 2020.41 lbs

Explanation:

number of students = 20

Force of each student = 450 N

Total upward force = 450 x 20 = 9000 N

(a)

Let m be the mass of car

F = m x g

9000 = m x 9.8

m = 918.37 kg

(b)

As we know that, 1 kg = 2.20 lbs

So, 918.37 kg = 2.20 x 918.37 = 2020.41 lbs