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djyliett [7]
4 years ago
14

The force needed to accelerate a stationary 2000 racing car to a speed of 144 km/h in a distance of 80 meters

Physics
1 answer:
CaHeK987 [17]4 years ago
7 0

Answer:

518400 Newton

Explanation:

Force F = mass m * Acceleration a

a = velocity v / time t

v = distance d / t

Therefore;

F = m * v² / d

with m = 2000 (unit not defined but say g)

v = 144 Km/h

d = 80 meters =0.08Km

F = 2Kg * 144Km/h * 144Km/h / 0.08Km

F = 518400 Newton

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Answer:

A. increases

Explanation:

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The muzzle velocity of an armor-piercing round fired from an M1A1 tank is 1770 m/s (nearly 4000 mph or mach 5.2). A tank is at t
loris [4]
<h2>Height of cliff is 66.43 meter.</h2>

Explanation:

Consider the horizontal motion of shell,

We have equation of motion s = ut + 0.5 at²

        Initial velocity, u = 1770 m/s

        Acceleration, a = 0 m/s²  

        Displacement, s = 6520 m      

     Substituting

                      s = ut + 0.5 at²

                     6520 = 1770 x t + 0.5 x 0 xt²

                      t = 3.68 s

      Time of flight of shell = 3.68 s.

Now consider the vertical motion of shell,

We have equation of motion s = ut + 0.5 at²

        Initial velocity, u = 0 m/s

        Acceleration, a = 9.81 m/s²  

        Time, t = 3.68 s      

     Substituting

                      s = ut + 0.5 at²

                      s = 0 x 3.68 + 0.5 x 9.81 x 3.68²

                      s = 66.43 m

      Height of cliff is 66.43 meter.

8 0
3 years ago
While practicing the trumpet you notice that every time you play a particular note a window in the room rattles. How can you exp
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Explain the causes of atmospheric pressure and why it changes with altitude?​
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2 years ago
HELP!!!!
BigorU [14]
Time = 13.5 / 2.5 = 5.4 seconds
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3 years ago
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