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3 years ago

The momentum of an object is determined by the object’s mass and velocity. Which object has more momentum?

Physics

1 answer:

Gnesinka [82]3 years ago

7 0

Answer:

You need to give the options but the formula is p=mv

Explanation:

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A 65-kg ice skater stands facing a wall with his arms bent and then pushes away from the wall by straightening his arms. At the

Marrrta [24]

Our values can be defined like this,

$m = 65kg$

$v = 3.5m / s$

$d = 0.55m$

The problem can be solved for part A, through the Work Theorem that says the following,

$W = \Delta KE$

Where

KE = Kinetic energy,

Given things like that and replacing we have that the work is given by

W = Fd

and kinetic energy by

$\frac {1} {2} mv ^ 2$

So,

$Fd = \frac {1} {2} m ^ 2$

Clearing F,

$F = \frac {mv ^ 2} {2d}$

Replacing the values

$F = \frac {(65) (3.5)} {2 * 0.55}$

$F = 723.9N$

B) The work done by the wall is zero since there was no displacement of the wall, that is d = 0.

6 0

3 years ago

a 1.2 kg rocket is launched from ground level with initial velocity of 12 m/s. What is the maximum height the rocket can reach?

Tanzania [10]

As the rocket is launched from the ground its height will go on increasing till it stops

So the height of rocket will be maximum when its speed becomes zero

so here we can use energy conservation theory

$PE = KE$

$mgH = \frac{1}{2}mv^2$

$9.8*H = \frac{1}{2}*12^2$

$H = 7.35 m$

So it will reach upto height 7.35 m

5 0

3 years ago

a ball rolls 6.0 meters as its speed changes from 15 meters per second to 10 meters per second. whaf is the average speed of the

yawa3891 [41]

(3) 12.5 don’t ask me to explain this

6 0

3 years ago

A 200-kg object has a 50-Newton rightward net force being applied to it. What is the magnitude of the rightward acceleration on

katovenus [111]

The formula for acceleration is force divided by mass.

Force = 50 N

Mass = 200 kg

Acceleration = ???

$\frac{50}{200} = \frac{1}{4}$

$\frac{1}{4} = 0.25$

~~

Acceleration = 0.25 m/s²

~~

Next time use, f = ma in a triangle,

F

M A

~~

I hope that helps you out!!

Any more questions, please feel free to ask me and I will gladly help you out!!

~Zoey

8 0

3 years ago

A crate on a motorized cart starts from rest and moves with a constant eastward acceleration of a = 2.20 m/s2. A worker assists

trasher [3.6K]

Answer:

Explanation:

Given

acceleration a =2.2 m/s^2

Force F(t) is given by

F(t)=5.40 t N/s

Power supplied by this force at different time t is given by

Power $=F\cdot v$