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ladessa [460]
3 years ago
12

A car accelerates at a constant rate from 0 m/s to 10.0 m/s for 5.00 seconds. What is the displacement?

Physics
1 answer:
kirill115 [55]3 years ago
8 0

Answer: A car slows from 22 m/s to 3.0 m/s at a constant rate of 2.1 m/s2. How many seconds are required before the car is a r2.1 m/s2 traveling at 3.0 m/s?

5 pages

Explanation:

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If a roller coaster car had 40,000 J of gravitational potential energy when at rest on the top of a hill how much kinetic energy
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Answer:

K.E = 30,000 J

Explanation:

Given,

The potential energy of the roller coaster car, P.E = 40000 J

The kinetic energy at height h/4, K.E = ?

According to the law of conservation of energy, the total energy of the system is conserved.

At height 'h', the total energy is,

                                    P.E = mgh

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At height 'h/4', the total energy is

                                     P.E + K.E = mgh

                                     P.E = mgh/4

                                     K.E = 1/2 mv²

Therefore,

                                   mgh/4 + 1/2 mv² = mgh

                                    gh/4 + v²/2 = gh

Hence,

                                      v² = 3gh/2

Substituting in the K.E equation

                               K.E = 1/2 mv²

                                      = 1/2 m (3gh/2)

                                       = 3/4 mgh

                                        = 3/4 x 40000

                                         = 30000 J

Hence, the K.E of the roller coaster car is, K.E = 30000 J

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In young's double silt experiment if the distance between the silts is 0.5 and the distance between the silts and screen is 2 ti
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En las demas opciones la magnitud de la velocidad (rapidez) cambia y/o la direccion.
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A crate falling from a plane is part of a closed system that has 24,450 J of
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