Potential energy = (mass) x (gravity) x (height)
1 joule = (1,000 kg) x (9.8 m/s²) x (height)
Height = 1 joule / (9,800 newtons)
= 1/9800 meter
= 0.000102 meter
= 0.102 millimeter (rounded)
Answer:
Answers are in the explanation
Explanation:
a)
vf² = vi² + 2gh
0 = vi² + 2(-9.8)(72)
vi = 37.57 m/s
b)
vf = vi + gt
0 = 37.57 - (9.8)t
t = 3.83 s
3.83 x 2 = 7.67 s
vf = vi + gt
vf = 37.57 - (9.8)(7.67)
vf = -37.60 m/s
c)
Its vertical velocity at the highest point is 0 m/s
Answer: Impulse = 4 kgm/s
Explanation:
From the question, you're given the following parameters:
Momentum P1 = 12 kgm/s
Momentum P2 = 16 kgm/s
Time t = 0.2 s
According to second law of motion,
Force F = change in momentum ÷ time
That is
F = (P2 - P1)/t
Cross multiply
Ft = P2 - P1
Where Ft = impulse
Substitute P1 and P2 into the formula
Impulse = 16 - 12 = 4 kgm/s
The magnitude of the impulse is therefore 4 kgm/s.
Answer:
Chemical
Explanation:
When sodium reacts with water, sodium, being an alkali, rips away electrons from water and creates an explosion. This happens because of the chemical properties of sodium. Hope this helps!