.Complete the following numericals step by step
1)A body of mass 1 kg undergoes a change of velocity of 4m/s in 4s what is the force acting on it?
2.If you apply a net force of 3 N on .1 kg-box, what is the acceleration of the box
3. Calculate the force exerted by the brakes on the motorcar which is moving with a velocity of 72 km/h and takes 5 s to stop after the application of brakes. Mass of the motorcar along with the passengers is 800 kg.
Answers
Answer:
In Physics there are some physicsal quantities which are either SCALARS or VECTORS
Explanation:
In Physics there are some physicsal quantities which are either SCALARS or VECTORS
Given : A body of mass 1 kg undergoes a change of velocity of 4m/s in 4s
To Find : force acting on it
Solution:
F= ma
F = Force
m = mass = 1 kg
a = acceleration
a = dv/dt
change of velocity of 4m/s in 4s
a = 4/4 = 1 m/s²
F = 1 * 1 = 1 N
Hence Force acting is 1 N.
a net force of 3 N on .1 kg-box,
a = 3/1 = 3 m/s²
72 km/h = 72 * 1000 / 3600 = 20 m/s
a = ( 0 - 20)/5 = - 4 m/s²
m = 800 kg
Force exerted by brakes = 800 * 4 = 3200 N
Learn More:
The gravitational force on the mass m placed at surface of earth is F ...
brainly.in/question/18670114
A lady weighing 80 Kg is standing on pencil heels, each having an ...
brainly.in/question/24070285