Physics, 24.03.2020 21:11 mv603177

5.Imagine you are ice skating with your BFF. Both of you at rest, when you shove him/her away from you. You have a mass of 65 kg and he/she has a mass of 55kg. When you shove off, you move away with a velocity of 2.0 m/s. With what velocity does your BFF move away from you

Answers: 3

Show answers

Answers

Answer from: Kalistaaaaaaa

v2 = 2.36 m/s

Explanation:

Momentum is simply the the product of mass of an object and it velocity. Generally, when object moves they have momentum . The unit for momentum is kgm/s.

During collision momentum is conserved . This means that

initial momentum = final momentum

If their is an equal and opposite reaction your momentum should be equal to your BFF.

m1 v1 = m2 v2

m1 = 65 kg

v1 = 2.0 m/s

m2 = 55 kg

v2 = ?

m1 v1 = m2 v2

65 × 2 = 55v2

130 = 55 v2

divide both sides by 55

v2 = 130/55

v2 = 2.36363636364

v2 = 2.36 m/s

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

Answer from: Quest

Answerstatic electricity shock;

Another question on Physics

Physics, 22.06.2019 10:30

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?

Answers: 2

Answer

Physics, 22.06.2019 15:30

This is the number of complete movements of a wave per second.

Answers: 1

Answer

Physics, 22.06.2019 17:40

Aball horizontally thrown from a cliff at 8m/s

Answers: 1

Answer

Physics, 22.06.2019 22:00

Which best term to describe a chemical reaction that absorbs energy from its surroundings? a.thermal conductor b.thermal insulator c.endothermic d.exothermic

Answers: 1

Answer

You know the right answer?

5.Imagine you are ice skating with your BFF. Both of you at rest, when you shove him/her away from y...

Questions