All categories

4 years ago

What is the mass of an object traveling at 20m/s and having a momentum of 60kg⋅m/s?

Physics

2 answers:

timurjin [86]4 years ago

8 0

Answer:

m=3kg

Explanation:

P=mv

60=m20

60/20=m

m=3kg

vichka [17]4 years ago

4 0

Answer:

m=3kg

Explanation:

Momentum=mass×speed

60[kg m/s]=m[kg]×20[m/s]

We get:

m=3kg

You might be interested in

The longer the wavelength, the lower the frequency, and the lower the energy. Lesson 4.07 True False

jenyasd209 [6]

It’s true. longer wavelength means a lower frequency, and a shorter wavelength means a higher frequency!

3 0

3 years ago

Consider two displacements, one of magnitude 3 m and another of magnitude 4 m. Show how the displacement vectors may be combined

Rufina [12.5K]

Answer:

Explanation:

A = 3m

B = 4 m

let the angle between the two vectors is θ.

the resultant of two vectors is given by

$R=\sqrt{A^{2}+B^{2}+2ABCos\theta }$

(a) R = 7 m

So, $7=\sqrt{3^{2}+4^{2}+2\times 3\times 4 Cos\theta }$

49 = 9 + 16 + 24 Cosθ

Cosθ = 1

θ = 0°

Thus, the two vectors are inclined at 0°.

(b) R = 1 m

So, $1=\sqrt{3^{2}+4^{2}+2\times 3\times 4 Cos\theta }$

1 = 9 + 16 + 24 Cosθ

Cosθ = - 1

θ = 180°

Thus, the two vectors are inclined at 180°.

So, $5=\sqrt{3^{2}+4^{2}+2\times 3\times 4 Cos\theta }$

25 = 9 + 16 + 24 Cosθ

Cosθ = 0

θ = 90°

Thus, the two vectors are inclined at 90°.

3 0

3 years ago

During a testing process, a worker in a factory mounts a bicycle wheel on a stationary stand and applies a tangential resistive

Alex

Answer:

616.223684211 N

Explanation:

$F_r$ = Resistive force on the wheel = 115 N

F = Force acting on sprocket

$r_2$ = Radius of sprocket = 4.75 cm

$r_1$ = Radius of wheel = 25 cm

Moment of inertia is given by

$I=mr_1^2\\\Rightarrow I=1.7\times 0.25^2\\\Rightarrow I=0.10625\ kgm^2$

Torque

$\tau=I\alpha\\\Rightarrow \tau=0.10625\times 4.9\\\Rightarrow \tau=0.520625\ Nm$

Torque is given by

$\tau=Fr_2-F_rr_1\\\Rightarrow F=\dfrac{\tau+F_rr_1}{r_2}\\\Rightarrow F=\dfrac{0.520625+115\times 0.25}{0.0475}\\\Rightarrow F=616.223684211\ N$

The force on the chain is 616.223684211 N

5 0

3 years ago

A sea breeze occurs because warm air rises on land and moves toward the ocean to cool. The cool air then moves from the ocean to

Norma-Jean [14]

Im going to go with a. True

7 0

3 years ago

Read 2 more answers

A passenger in a car is holding an open water bottle when the car stops suddenly. Why does the water in the bottle splash out wh

OlgaM077 [116]

Answer:

The answer is It has inertia

Explanation:

I just got it correct on E2020

8 0

4 years ago

Read 2 more answers