PHYSICS MIDDLE SCHOOL

a bus travelling on a straight road at 25m/s accelerates uniformly at 5m/s squared for 2 seconds. find its speed in kilometres per hour

Answers

Answer 1
Answer:

Answer:

126 kmh⁻¹

Explanation:

We can simply solve this by applying motion equations

where  

v - final velocity

u - initial velocity

a-acceleration

t - time

v = u + at

  = 25 + 5×2 = 35 ms⁻¹

  = (35/1000)×3600 = 126 kmh⁻¹

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Draw five protons in the nucleus of the atom

Answers

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Please Explain two ways nitrogen gas in the atmosphere is changed into nitrogen compounds that plants can use. -Thank you all in advance! I do need this by 9:20 Am Eastern Time tomorrow

Answers

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Because weight is a force, it is measured in ___________

Answers

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1) Car A has a mass of 1,000 kg and is traveling 60 km/hr. Car B has a mass of 2,000 kg and is traveling 30 km/hr. Compare the kinetic energy of car A with that of car B?
A) equal
B) half as much
C) twice as much
D) four times as much

Answers

Answer: C

Explanation:

Calculate EkA -kinetic energy of car A

m=1000kg

Va=16.66 m/s

EkA=m*Va²/2

Eka=(1000kg*277.556m²/s²)/2

Eka=138 777.8 J

Calculate kinetic energy of CarB:

m=2000 kg

Vb=8.33 m/s

Ekb=(m*Vb²)/2

Ekb=(2000kg*69.39m²/s²)/2

Ekb=69 388.9 J

compare Eka with EkB

Eka/Ekb=138 777.8 J/69 388.9

Eka/Ekb=2

Final answer:

The kinetic energy of car A is twice as much as that of car B. This is calculated using the formula for kinetic energy, which is 1/2 * mass * (velocity)^2.

Explanation:

To compare the kinetic energy of car A with that of car B, we first need to understand the mathematical formula for kinetic energy, which is 1/2 * mass * (velocity)^2.

Let's calculate for each car:

  • For car A: kinetic energy = 1/2 * 1000 kg * (60 km/hr)^2 = 1800000 Joules
  • For car B: kinetic energy = 1/2 * 2000 kg * (30 km/hr)^2 = 900000 Joules

Therefore, car A has twice as much kinetic energy as car B.

Learn more about Kinetic Energy here:

brainly.com/question/26472013

#SPJ3

What two motions combine to produce an orbit

Answers

The correct option for above statement is:

Gravity and Inertia

Explanation:

For instance, Gravity from our sun holds us at an essentially same range all the way around. It makes sure we don't sling off into the wisdom of our solar system. Inertia, keeps us in movement, if there were no inertia, our revolution would stop at a standstill. If we stayed, we would be sucked into the sun by its gravity.
Field motion ( as opposed to collision motion) which are forces like gravity. And Static motion ( as opposed to kinetic motion)
Static motion is where an object moves on or around another moving object. (Circular motion)

Hope this helped
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