Answer:
Look at the picture.
Explanation:
I solved all of questions except the length of the slope because I don't know about it.
Sliding friction is harder to overcome, and steals
more energy whenever you're moving.
That's why we switched from sleds to wheels
several thousand years ago.
Answer:
3500j
0.250 kg
14.14 m/s
220500 j
93.91 m/s
Explanation:
K.E =1/2 m v^2
first question
1/2×700×10=3500 j
second question
2×78.2/25^2= 0.250 kg
Third question
8kj=8000j
root (2×8000/80)= 14.14 m/s
Last one
P.E=MGH
so it will be
P.E=50×450×9.8=220500 j
the speed
root (2×220500/50)=93.91 m/s
Answer:
94.248 g/sec
Explanation:
For solving the total current of the blood passing first we have to solve the cross sectional area which is given below:

And, the velocity of blood pumping is 30 cm^2
Now apply the following formula to solve the total current

Q = 94.248 g/sec
Basically we applied the above formula So, that the total current could come
Answer:
Resultant horizontal force = 143 N
Explanation:
Since the a gle is 30° northwest, then it means the resultant force will be horizontal and as such;
Resultant horizontal force = 165 * cos 30
Resultant horizontal force = 142.89
Approximating to a whole number gives;
Resultant horizontal force = 143 N