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frozen [14]
3 years ago
7

A projectile is launched at an angle above the ground. (upwards). The vertical

Physics
1 answer:
xeze [42]3 years ago
6 0
If you take gravity to be 10m/s^2 (approximately) then after 2 seconds of flight it will decrease to 10m/s

If you take g=9.8 then it will decrease by 2 x 9.8 instead.
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Q. A mass of 300g is lifted to a<br> height of 10m<br> 205 by a person. Calculate his work done
sergiy2304 [10]
A=mgh
m=300g=0.3kg
g=9,81 m/s^2
h=10m
A=29.43J
3 0
2 years ago
What are the main activities involved in studying physics?
Firlakuza [10]
The main activity that is involved in studying of physics is the study of natural laws. The study of physics has to do with many aspects of the universe. Physics majorly looks into the natural laws that operate in the universe and describe how they affect matter in relation to time. 
7 0
4 years ago
A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle
ra1l [238]

Answer:

a) t = 4.16 s

b) x = 141.51 m

Explanation:

Given

v = 21.5 m/s

x0 = 52.0 m

a = 6.0 m/s²

a) Motorcycle

x = v0*t + (a*t²/2)

x = 21.5t + (6*t²/2)

x = 21.5t + 3t²   <em>(I)</em>

Car

x = x0 + v0*t

x = 52 + 21.5t  <em>(II)</em>

<em />

then we can apply <em>I = II</em>

21.5t + 3t² = 52 + 21.5t

⇒ 3t² = 52

⇒ t = 4.16 s

b) We can use <em>I</em> or <em>II</em>, then

x = 52 + 21.5*(4.16)

⇒ x = 141.51 m

8 0
3 years ago
If a car travels 40 km/hr for hours how far has it traveled
Rainbow [258]
It depends on how many hours!
1 hour = 40km
2 hours = 80km
8 0
3 years ago
electromagnetic waves of wavelengths 1,34nm are emitted. how much energy do photons of this light have​
Sergio039 [100]

Answer:

energy =  \frac{planck  \: const.\:  \times speed \: of \: light}{wavelength}

8 0
3 years ago
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