Answer:
What is the quantity that has the units of m/s²?
- Velocity
- <em><u>Acceleration✓</u></em>
- Force
- Momentum
<em><u>Acceleration</u></em> is the quantity that has the units of m/s².
Explanation:
Acceleration is the rate of change of velocity.
Acceleration=(Final velocity-Initial velocity)/Time.
Answer:
r = 4.747 cm and h = 9.4925 cm
Explanation:
We know that volume of a cylinder is given as:
V = πr²h
Also, surface area is given as;
S = 2πr² + 2πrh
Where r is radius and h is height
Now, we are told that the volume is 672 cm³
Thus, πr²h = 672
Making h the subject gives;
h = 672/πr²
Putting 672/πr² for h in the surface area equation gives;
S = 2πr² + 2πr(672/πr²)
Factorizing gives;
S = 2π[r² + 672/πr]
Differentiating to get first derivative gives;
S' = 2π[2r - (672/πr²)]
Equating to zero gives;
2π[2r - (672/πr²)] = 0
4πr - 1344/r² = 0
4πr = 1344/r²
r³ = 1344/4π
r³ = 106.95212175775
r = ∛106.95212175775
r = 4.747 cm
So, since h = 672/πr²
Then, h = 672/π(4.747)²
h = 9.4925 cm
Answer:
1875 kg car- U1;M1
1025 kg car- U2;M2
Explanation:
according to Law of conservation of linear momentum
M1×U1 + M2×U2 = M1×V + M2×V
1875×23 +1025×17 = V(1875+1025)
43125 + 17425. =V×2900
V =60550/2900
V =20.88 ms-1
the two cars move with a speed of 20.88ms-1 immediately after coalition
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