Question

a boy pushes on a parked car with a force of 200 n. the car does not move. how much work does the boy do on the car? 0 j 200 j 200 n cant be determined; a moving bus transfers chemical potential energy into _. kinetic energy solar energy gravitational potential energy electrical energy; at what point on a roller coaster is the gravitational potential energy (gpe) the lowest. at the lowest point of the roller coaster while on the decline at the highest point of the roller coaster while on the incline

Explanation:

1. Question 1: At what point on a roller - coaster is the gravitational potential energy (GPE) the LOWEST?

• # Explanation:
• ## Step1: Recall the formula for gravitational potential energy
• The formula for gravitational potential energy is $GPE = mgh$, where $m$ is mass, $g$ is the acceleration due to gravity, and $h$ is the height above a reference level.
• ## Step2: Analyze the relationship between height and GPE
• Since $m$ and $g$ are constant for a given object on Earth, $GPE$ is directly proportional to $h$. The lower the height $h$, the lower the $GPE$.
• # Answer:
• at the lowest point of the roller - coaster

1. Question 2: A moving bus transfers chemical potential energy into ____.

• # Explanation:
• ## Step1: Understand the energy - conversion process in a bus
• A bus has an engine that burns fuel (chemical potential energy). The engine's work makes the bus move.
• ## Step2: Identify the resulting energy form
• The motion of the bus is associated with kinetic energy.
• # Answer:
• kinetic energy

1. Question 3: A boy pushes on a parked car with a force of 200 N. The car does not move. How much work does the boy do on the car?

• # Explanation:
• ## Step1: Recall the work - formula
• The work formula is $W = Fd\cos\theta$, where $F$ is the force applied, $d$ is the displacement, and $\theta$ is the angle between the force and the displacement.
• ## Step2: Analyze the given situation
• Here, the car does not move, so $d = 0$.
• ## Step3: Calculate the work
• Substituting $d = 0$ into the work formula $W=F\times0\times\cos\theta = 0$.
• # Answer:
• 0 J

Answer:

1. Question 1: At what point on a roller - coaster is the gravitational potential energy (GPE) the LOWEST?

• # Explanation:
• ## Step1: Recall the formula for gravitational potential energy
• The formula for gravitational potential energy is $GPE = mgh$, where $m$ is mass, $g$ is the acceleration due to gravity, and $h$ is the height above a reference level.
• ## Step2: Analyze the relationship between height and GPE
• Since $m$ and $g$ are constant for a given object on Earth, $GPE$ is directly proportional to $h$. The lower the height $h$, the lower the $GPE$.
• # Answer:
• at the lowest point of the roller - coaster

1. Question 2: A moving bus transfers chemical potential energy into ____.

• # Explanation:
• ## Step1: Understand the energy - conversion process in a bus
• A bus has an engine that burns fuel (chemical potential energy). The engine's work makes the bus move.
• ## Step2: Identify the resulting energy form
• The motion of the bus is associated with kinetic energy.
• # Answer:
• kinetic energy

1. Question 3: A boy pushes on a parked car with a force of 200 N. The car does not move. How much work does the boy do on the car?

• # Explanation:
• ## Step1: Recall the work - formula
• The work formula is $W = Fd\cos\theta$, where $F$ is the force applied, $d$ is the displacement, and $\theta$ is the angle between the force and the displacement.
• ## Step2: Analyze the given situation
• Here, the car does not move, so $d = 0$.
• ## Step3: Calculate the work
• Substituting $d = 0$ into the work formula $W=F\times0\times\cos\theta = 0$.
• # Answer:
• 0 J