Question

A ball of 200 g mass is moved with 20 m/s, and decreases to 10 m/s in 5 seconds due to air friction. So, force of friction due to air is
1N
4N
0.4 N
10 N​

Answer 1

The force due to friction will be equal to 0.4 N

Explanation:

• From the definition of force, we know

• F = ma

• We also know that , a = (Vi-Vf)/t

• Putting the value in above equation, we get

• F = m x (Vi-Vf)/t)

• Putting the value

• F = 200 x (20-10)/5

• F = 400 gms-2

• We need to convert it to kg to make Neuton

• F = 0.4 kgms-2/ 0.4 N

Learn more about frictional force from the link below

https://brainly.in/question/4679475

Answer 2

Answer:

0.4

Explanation:

upar dekhlo explanation