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slava [35]
3 years ago
7

A ball rolls at a speed of 6cm/s. How far does the ball roll in 40 seconds ? ____cm

Physics
1 answer:
sesenic [268]3 years ago
8 0

Answer:

240cm

Explanation:

Speed = 6cm/s

Time = 40 seconds

Speed= distance/time

6cm/s = distance/40seconds

Distance = 6×40

Distance = 240cm

Hence, in 40 seconds, the ball must have rolled the distance of 240cm

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A race car has a mass of 710 kg. It starts from rest and travels 40 m in 3.0 s. The car is uniformly accelerated during the enti
Archy [21]

The net force applied to it is 6311.9 N.

To calculate the net force to the car, first, we need to find the acceleration using the equation of motion.

Force: This as be defined as the product of mass and acceleration of a body. The S.I unit of force is Newton (N)

⇒ Formula

  • S = ut+at²/2................. Equation 1

⇒ Where:

  • u = Initial velocity
  • S = Distance
  • t = Time
  • a = acceleration

From the question,

 ⇒Given:

  • S = 40 m
  • t = 3.0 s
  • u = 0 m/s (at rest)

⇒ Substitute these values into equation 1

  • 40 = 0(3)+a(3²)/2

⇒ Solve for a

  • 9a = 80
  • a = 80/9
  • a = 8.89 m/s²

⇒ To get the force, we use the formula below

  • F = ma    .................... Equation 2

⇒ Where:

  • F = Force applied
  • m = mass of the car

⇒ Given:

  • m = 710 kg
  • a = 8.89 m/s²

⇒ Substitute these values into equation 2

  • F = 710(8.89)
  • F = 6311.9 N

Hence the net force applied to it is 6311.9 N.

Learn more about force here: brainly.com/question/13370981

6 0
2 years ago
#8 physics help plssss
Goshia [24]
For efficiency the top one is 50% and the bottom one is 72%
3 0
3 years ago
What is the RMS speed of Helium atoms when the temperature of the Helium gas is 206.0 K? (Possibly useful constants: the atomic
saw5 [17]

Answer:

a)1.13×10³

b)1.6×10³

Explanation:

Given:

Boltzmann's constant (K)=1.38×10^-23 J/K

atmoic mass of helium = 4 AMU or 4×1.66×10^-27kg

a)The formula for RMS speed (Vrms) is given as

Vrms=\sqrt{\frac{3KT}{m} }

where

K= Boltzmann's constant

T= temperature

m=mass of the gas

Vrms=\sqrt{\frac{3\times 1.38\times 10^{-23}\times 206}{6.64\times 10^{-27}}}

Vrms=1.13\times 10^{3}m/s

b) RMS speed of helium when the temperature is doubled

Vrms=\sqrt{\frac{3\times 1.38\times 10^{-23}\times 2\times 206}{6.64\times 10^{-27}}}

Vrms=1.598\times 10^{3}m/s

4 0
3 years ago
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When did the story happen of paragraph ​
-BARSIC- [3]

Answer:

1. The story happens at Masayahin Senior High School,during his first class in grade 11.

2. The transitional divices are used is At first,then,after a year, in the end.

3. I entered the class and jasper offered me a seat.

4. A story.

5. in chronological orde

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3 years ago
Define the problem. Look around your house or outside. Is there anything that you're wondering about or have questions about?
bekas [8.4K]

Answer:

Water

Explanation:

How do we have water at our disposal, like that's crazy.

6 0
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