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kobusy [5.1K]
3 years ago
13

Name one benefit and one limitation of Comparative investigations

Physics
2 answers:
GalinKa [24]3 years ago
8 0
Comparative investigation is a research method that makes comparison across different countries of the world. Limitation : data set in different countries may be defined differently. Benefit : the method is flexible.
tatuchka [14]3 years ago
6 0

Answer: Comparative investigations provide large amounts of information and use a wide range of variables. However, they may reveal relationships that do not always indicate cause and effect.

Explanation:

it was the given answer

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A projectile is launched horizontally from a height of 8.0 m. The projectile travels 6.5 m before hitting the ground.
lozanna [386]
You can find

1) time to hit the ground
2) initial velocity
3) speed when it hits the ground

Equations

Vx = Vxo

x = Vx * t

Vy = Vyo + gt

Vyo = 0

Vy = gt

y = yo - Vyo - gt^2 / 2

=> yo - y = gt^2 / 2

1) time to hit the ground

=> 8.0 = g t^2 / 2 => t^2 = 8.0m * 2 / 9.81 m/s^2 = 1.631 s^2

=> t = √1.631 s^2 = 1.28 s

2) initial velocity

Vxo = x / t = 6.5m / 1.28s = 5.08 m/s

3) speed when it  hits the ground

Vy = g*t = 9.81 m/s * 1.28s = 12.56 m/s

V^2 = Vy^2 + Vx^2 = (12.56 m/s)^2 + (5.08 m/s)^2 = 183.56 m^2 / s^2

=> V = √ (183.56 m^2 / s^2) = 13.55 m/s
7 0
3 years ago
A parachute on a racing dragster opens and changes the speed of the car from 85 m/s to 45 m/s in a period of 4.5 seconds. What i
Alex Ar [27]

The acceleration of the dragster is 8.89 m/s².

To find the acceleration, the given values are,

V₀ = 85 m/s

V = 45 m/s

<h3>What is acceleration?</h3>
  • Acceleration is a rate of change of velocity with respect to time with respect to direction and speed.
  • Acceleration formula can be written as,

         \overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}`

a = acceleration

v = final velocity

v₀= starting velocity

t  =  time

  • Acceleration is a vector quantity.
  • The unit of acceleration is m/s².

Substituting the given values in the formula,

    a = (V-Vo)/time

       = (45-85m/s)/4.5 s.

    a = 8.89m/s².

Thus, the acceleration a of the dragster is 8.89 m/s².

Learn more about acceleration,

brainly.com/question/8231525

#SPJ1

6 0
2 years ago
It is important to organize your data because
Natasha_Volkova [10]
The second one is false
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4 years ago
Vector A has a magnitude of 8.0 m and points 30 degrees north of east; vector B has a magnitude of 6.0 m and points 30 degrees w
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D I believe it is hope it woke
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Give two ways in which the water vapour changes as it passes down the glass tube in the condenser
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<span>It changes from a liquid into a solid which means it is changing states. It also is changing temperature due to the condenser increasing or decreasing the temperature in order for the vapor to be transformed in liquid.</span>
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