The gravitational force on the rider is:
- Way up: equal to mg
- Way down: equal to mg
Explanation:
The choices are missing: find them in the attached figure.
The force of gravity acting on a body is a force directed downward (towards the Earth's centre) and whose magnitude is

where
m is the mass of the body
g is the acceleration due to gravity
The value of g is approximately constant near the Earth's surface and it is

During the ride, the mass of the rider, m, remains constant. This means that the magnitude of the gravitational force, mg, exerted on the rider remains constant during the rider.
Therefore, the correct answer is
- Way up: equal to mg
- Way down: equal to mg
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Answer:
The deceleration must have the engineer to avoid the accident is
a=-5.238 
Explanation:

While the engineer reacts the train continue moving so


Now the final velocity have to be zero so using equation can find deceleration

Answer:
Magnitude : 3.14 m/s
Direction : 301.31 deg
Explanation:
Assuming that the ball moves in positive x-direction initially.
= mass of each ball
= initial velocity of first ball before collision = 
= initial velocity of second ball before collision = 
= final velocity of first ball after collision = 
= final velocity of second ball after collision = ?
Using conservation of momentum
+
=
+
(
) + (
) = (
) +
= (
) - (
)
= 
magnitude of final velocity of second ball is given as
magnitude = sqrt((1.63)² + (- 2.68)²) = 3.14 m/s
Direction is given as
θ = 360 + tan⁻¹(- 2.68/1.63)
θ = 301.31 deg
Answer:
The correct option is D
Explanation:
In the course of the experiment, two key phrases/variables defined the experiment done,
i) the release height of the steel ball (independent variable)
ii) the distance the ball travels from the ramp before falling to the ground (dependent variable)
The only option that contains and relates this two variables as carried out during the course of the experiment is option D.
Answer: ELECTRICAL ENERGY to CHEMICAL ENERGY to SOUND ENERGY.
Explanation:
There are laws governing the conservation of energy in physics. The first law of thermodynamics states that in a closed system, energy can neither be created nor destroyed during transformation. With this, the total energy of a given system always remains constant.
This first law of thermodynamics which arouse from special relativity, says that changes in the energy of systems will also coincide with changes in a measure of its energy content.
The ELECTRICAL energy from the outlet charger is transformed and stored as CHEMICAL energy in the battery of the phone. This in turn is converted to SOUND energy when the phone rings.