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Answer:
1. When a spring scale is used to do work pulling a cart to the top of an incline, the elastic energy stored in the spring is converted into gravitational potential energy, since the top of an incline has a certain height.
2. The roller coaster get its gravitational potential energy from the kinetic energy it carries when it moves with a certain velocity.
3. Truckers use a ramp because it is easier to load a truck with less applied force. Although the work required is the same, without the ramp the force that they should apply is much greater, hence more difficult.
[tex]W = F_1 \times h\\W = F_2 \times d \times \cos(\theta)[/tex]
h is greater than (d x cos(Θ)), hence F2 is smaller than F1.
The force needed to load a truck without a ramp is greater than with a ramp, that is why Truckers use a ramp.
1. When a spring scale is used to do work pulling a cart to the top of an incline, since the top of an incline has a certain height, the elastic energy stored in the spring is converted into gravitational potential energy,
2. When roller coaster moves with a certain velocity, it gets its gravitational potential energy from the kinetic energy.
3. Truckers use a ramp because it is easier to load a truck without applying much force.
[tex]\bold {W = F_1 . h}\\\\\bold {W = F_2 . dcos\theta}[/tex]
Where,
F1 - force needed without ramp
F2- force needed with ramp
Since, [tex]\bold { dcos\theta}[/tex] is smaller than the h,
Therefore, the force needed to load a truck without a ramp is greater than with a ramp, that is why Truckers use a ramp.
To know more about gravitational potential energy,
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