Should a flat grassland or a hillside have deeper soil? Explain your answer.

A car has a momentum of 20,000 kg • m/s. What would the car’s momentum be if its velocity doubles?

jenyasd209 [6]

40 000 kg.m/s...P=MV then 20 000=M2V therefore Pnew=2MV i.e Pnew= 2Pold ...Pnew=2Pold...Pnew=2(20 000)...Pnew=40 000

8 0

3 years ago

A mysterious rocket-propelled object of mass 47.5kg is initially at rest in the middle of the horizontal, frictionless surface o

NARA [144]

Answer:

Distance d=8.63m

Explanation:

mass of object m=47.5 kg

Initial velocity vi=0 m/s

Magnitude of force on object F(t)=(17.0 N/s)t

To find

Distance

Solution

The rocket accelerates due to variable force so we apply Newtons second law but the acceleration will not be constant because the force is not constant

We use ax=Fx/m to find acceleration but it must be integrate to find velocity and then the distance that rocket travels

So

$ax=Fx/m\\gives\\ax(t)=(17.0N/s)t/(47.5kg)\\ax(t)=(0.35789m/s^{3})t\\ As\\Vx(t)=V_{o}+\int\limits^{}_{} { \lim_{0 \to \ t} ax(t) } \, dt=(0.178945m/s^{3} )t^{2}\\ X-X_{o}=\int\limits^{}_{} { \lim_{0 \to \ t} v(t) } \, dt=(0.05964m/s^{3})t^{3}\\ as\\t=5.25s\\So\\X-X_{o}=(0.05964m/s^{3})(5.25s)^{3}\\X-X_{o}=8.63m$

Distance d=8.63m

8 0

3 years ago

Please explain how I would do this!!!

nevsk [136]

Answer:

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.

Explanation:

NMNMBNMNMN

6 0

3 years ago

After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 36.0 m horizontally from the end o

Cloud [144]

Answer

v = 18.99 m/s

$\theta = 33.20^0$