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Ronch [10]
3 years ago
12

Velocity v (m/s)

Physics
1 answer:
Sonja [21]3 years ago
3 0

Explanation:

given solution

h=45m v^2=u^2+2gh

g=10m/s^2 v^2=0^2+2×10m/s^2×45m

vi=0 v^2=900m^2/s^2

  • v=30
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6. A 0.09 kg arrow hits a target at 22 m/s and penetrates 4 cm before stopping.
tatyana61 [14]
A ) v = v o - a t
0 = 22 - a · t
a · t = 22
d = v o · t - a t²/2
0.04 = 22 t - 22 t / 2
0.04 = 11 t
t = 0.04 : 11 = 0.003636 s
a = 22 / t
a = 6050 m/s²
F = m · a = 0.09 kg · 6050 m/s²
F ( target→arrow) = - 544.5 N
b ) F ( arrow→target ) = 544.5 N
c )  If the speed was doubled:  v = 44 m/s;
F = a m
a = 6050 m/s²
a · t = 44
t = 6050 : 0.04
t = 0.007272 s
d = 44 t - 44 t/2 = 22 t
d = 22 · 0.007272
d = 0.16 m = 16 cm
8 0
3 years ago
The slope of a linear velocity-time graph tells us the _____ of the object.
Andrew [12]
Speed of the object !!!!
4 0
3 years ago
Which of the following is the flow of electrons through a wire or a conductor?
Sonja [21]

Explanation:

electric current is the answer

7 0
3 years ago
Explain how does a convex lens produce real image from virtual object​
Sphinxa [80]

Answer:

Real images are formed where rays of light actually converge, whereas virtual images occur with they are perceived to converge. Real images can be produced by passing light through converging lenses or with a concave mirror of some sort.

Explanation:

hope that helped a little :)

6 0
3 years ago
Read 2 more answers
A proton is accelerated down a uniform electric field of 450 N/C. Calculate the acceleration of this proton.
olasank [31]

Answer:

The acceleration of proton will be 431.137\times 10^8m/sec^2

Explanation:

We have given electric field E = 450 N/C

Charge on proton =1.6\times 10^{-19}C

Force on electron due to electric field is given by F=qE=1.6\times 10^{-19}\times 450=720\times 10^{-19}N

Mass of electron m=1.67\times 10^{-27}kg

Now according to second law of motion F=ma

So 720\times10^{-19}=1.67\times 10^{-27}a

a=431.137\times 10^8m/sec^2

So the acceleration of proton will be 431.137\times 10^8m/sec^2

6 0
3 years ago
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