High School

Newton's Second Law

1) A 3 kg box is accelerating at 9 m/s². What is the force acting on the box?

2) A car with a mass of 780 kg has a 235 N force acting on it. What is the acceleration of the car?

3) An object is moving with an acceleration of 5 m/s² due to an acting force of 10 N. What is the object’s mass?

Answer :

  1. The force acting on the box is 27N
  2. The acceleration of the car is 0.30 m/s²
  3. The object's mass is 2 kg

Newtons 2nd law

From Newton's second law,

F = ma

Where F is the force

m is the mass

and a is the acceleration

Q.1
Here, we are to determine the force acting on the box

m = 3 kg

a = 9 m/s²

Using the formula,

F = ma

F = 3 × 9

F = 27N

Hence, the force acting on the box is 27N

Q.2

Here, we are to determine the acceleration of the car

m = 780 kg

F = 235 N

Using the same formula,

F = ma

235 = 780 × a

a = 235 / 780

a = 0.30 m/s²

Hence, the acceleration of the car is 0.30 m/s²

Q.3

Here, we are to determine the object's mass

a = 5 m/s²

F = 10 N

Using the same formula,

F = ma

10 = m × 5

m = 10 / 5

m = 2 kg

Hence, the object's mass is 2 kg

Learn more on Newton's 2nd law here: https://brainly.com/question/13839211

#SPJ1

Other Questions