This means acceleration a is constant.
Let
a) vo be the initial speed, at t=0
b) v be the final speed after time t
c) d distance travelled in time t
Then we have:
a) v=vo+a×t
b) v²=vo²+2×a×d (Galilei's equation)
c) d=vo×t+a×t²/2
d) average speed vm=(vo+v)/2
The impulse of the boxers punch is 28 kgm/s.
The given parameters;
- <em>applied force by the boxer, F = 1400 N</em>
- <em>time of force action, t = 0.02 s</em>
<em />
The impulse of the boxers punch is calculated as follows;
where;
- <em>F is the applied force (N)</em>
- <em>t is the time of force action (s)</em>
The magnitude of the impulse is calculated as follows;
Thus, the impulse of the boxers punch is 28 kgm/s.
Learn more about impulse here: brainly.com/question/25700778
This question is asking the force on the rope. We can find this by using centripetal acceleration, then multiply by the ice skater's mass.
First we need to find the centripetal acceleration, which is a = v^2/r
We are given v and r, so we solve for a.
a = [(5.14m/s)^2]/(0.525m) = 50.323 m/s^2
Next multiply by the ice skater's mass (because F=ma) which is 44.6 kg
We then get F = (50.323m/s^2)(44.6kg) = 2244.407924N
Divide by 10^3 to get kN, we get:
2.244kN
Hope this helps!
<span>graphite (2.16 g/cm3)
glycerin (1.26 g/cm3)
copper (8.9 g/cm3)
silver (10.5 g/cm3
</span>
Answer:
Explanation:
In order to use a device rated for use in 240 volt for use in 120 V , we have to use a step down transformer . In step down transformer no of turn in secondary coil is less than that in primary coil .
For transformer the relation is as follows
V₂ / V₁ = N₂ / N₁ = turn ratio
Where V₂ and V₁ are volts in secondary and primary coil and N₂ and N₁ is no of turns in secondary and primary coil.
Here V₂ = 120V , V₁ = 240 V
turn ratio = N₂ / N₁ = V₂ / V₁ = 120 / 240 = .5
turn ratio = .5 .
