# Question

In a college homecoming competition, eighteen students lift a sports car. While holding the car off the ground, each student exerts an upward force of 400 N.

(a) What is the mass of the car in kilograms?

(b) What is its weight in pounds?

(a) What is the mass of the car in kilograms?

(b) What is its weight in pounds?

## Answer to relevant Questions

(a) A horizontal force acts on an object on a frictionless horizontal surface. If the force is halved and the mass of the object is doubled, the acceleration will be (1) four times, (2) two times, (3) one-half, (4) ...When a horizontal force of 300 N is applied to a 75.0-kg box, the box slides on a level floor, opposed by a force of kinetic friction of 120 N. What is the magnitude of the acceleration of the box? In Exercise 2, if the 35-N force acted downward at an angle of 40° relative to the horizontal, what would be the acceleration in this case? Car B is traveling twice as fast as car A, but car A has four times the mass of car B. Which car has the greater kinetic energy? If a spring is compressed 2.0 cm from its equilibrium position and then compressed an additional 2.0 cm, how much more work is done in the second compression than in the first? Explain.Post your question

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