Answer:
2084 kg*m/s
Explanation:
Impulse is change in momentum
Mathematically;
Impulse, J= F*t=mΔv where
F= ma = 1500 * { 30.56 - 16.67}/2*60
F= 1500 *0.11575
F= 174 N
J=F*t
J= 174*120*0.1
J= 2084 kg*m/s
Answer:
<h2>D) S increases because at all times Rock X falls with a greater speed than Rock Y</h2>
Explanation:
As we know that Stone X is dropped first and then after some time stone Y is dropped
Now we have
similarly for Y
now the relative acceleration of two stones while they are in air is ZERO
also we know from above equations
so the separation between two stones will keep on increasing as the speed of X is more than the speed of Y
1. ability to be pounded into shapes
2. how well a substance flows
3. the mass divided by its volume
4. degree of smoothness
5. ability to dissolve in another substance
6. how shiny a material is
7. ability to be pulled into a wire
Answer:
From the concept of energy conservation, Ei=Ef
Explanation:
mgh=1/2mv^2
=> v=
\sqrt{2gh}2gh
=
\sqrt{2 \times 9.8 \times 8.8}2×9.8×8.8
=
\sqrt{172.28}172.28
=13.12m/s.
Since car is accelerating uniformly that means we it is accelerating at constant rate if you can say that way. To find its acceleration all we have to do is find difference between v1=13 m/s and v2 = 25m/s and divide it by interval that car is taking to accelerate.
a = (v2-v1)/t = 2,4m/s^2
since car is accelerating at constat rate and truck covers same distance as car needs to accelerate from 13 to 25m that means that we can say that in that period truck travelled at cars average speed.
Vtruck = (v1 + v2)/2 = 19m/s
