Answer:
Speed does the 60-kg skater acquire relative to the ice = 0.281 m/s
Explanation:
Momentum is conserved in this case.
Initial momentum = Final momentum.
Initial momentum = Initial momentum of skater 1 + Initial momentum of skater 2
Initial momentum = 45 x 0 + 60 x 0 = 0 kg m/s
Final momentum = 45 x 0.375 + 60 x u = 16.875 + 60 u
Here we need to find u.
We have
0 = 16.875 + 60 u
u = -0.281 m/s
Speed does the 60-kg skater acquire relative to the ice = 0.281 m/s
Answer:
It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818–1889).
Explanation:
Answer:
The net force acting on the bobsled is 300 N.
Explanation:
Given:
Mass of the bobsled is,
Displacement is,
Initial speed is, m/s
Final speed is, m/s
Net acceleration acting on the bobsled can be determined using the following Newton's equation of motion:
Plug in all the given values and solve for acceleration, .
Now, as per Newton's second law, net force is the product of mass and acceleration. So,
Therefore, the net force acting on the bobsled is 300 N.
Explanation:
Two objects that only have the force of gravity acting on them, will fall with the same acceleration <span>g=9.8<span>m<span>s2</span></span>; g=32.2<span><span>ft</span><span>s2</span></span></span> and will therefore hit the ground at the same time.
When you drop a feather, air resistance acts on all the surfaces of the feather. This causes the feather to slow down.
Air resistance depends on two factors: the speed of the object (increased for example by throwing it), and its surface area.
hope this can give u a little bet more to know about how to get ur answer :P
have a gud day and gud luck!
friction make non moving objects starts to move
there are different types of force which may help them to move