Week 7: Work and Energy Capabilities

Pregunta 1 de 10

1

Work is the product of:

Selecciona una de las siguientes respuestas posibles:

Force x Time
Force x Distance
Energy x Distance
Energy x Time

Explicación

Pregunta 2 de 10

1

Rellena los espacios en blanco para completar el texto.

A woman carries a 5 kg box of clothes to donate into the shop. If she walks a horizontal distance of 10 meters from her car to the shop door, how much work has gravity done on the box?

First blank is the numerical value. The second blank is for the units.

W =

Explicación

Pregunta 3 de 10

1

Rellena el espacio en blanco para completar el texto.

How much potential energy does a 1 kg textbook have if it is thrown to a height of 5 meters? (Use a value of 10 for the acceleration due to gravity)

U = J

Explicación

Pregunta 4 de 10

1

A book is dropped and slams loudly onto a desktop. Compare the kinetic energy at the bottom to the potential at the top of its motion.

Selecciona una de las siguientes respuestas posibles:

KE > U
U > KE
KE = U
Need more values

Explicación

Pregunta 5 de 10

1

Rellena el espacio en blanco para completar el texto.

What is the kinetic energy of a 1000 kg car moving at 10 m/s?

KE = J

Explicación

Pregunta 6 de 10

1

In order to life a 1 kg book to a height of 2 m, how much work must be done? Use a value of 10 for the acceleration due to gravity.

Selecciona una de las siguientes respuestas posibles:

2 J
0.2 J
200 J
20 J

Explicación

Pregunta 7 de 10

1

Rellena el espacio en blanco para completar el texto.

How fast is a 5 kg ball moving the instant before striking the ground after it is dropped from a height of 4 meters?

v = m/s

Explicación

Pregunta 8 de 10

1

A boy pushes a chair with a force of 25 N. If he exerts the force for 2 meters, how much work has he done on the chair?

Selecciona una de las siguientes respuestas posibles:

25 J
50 J
50 N
12.5 J

Explicación

Pregunta 9 de 10

1

A truck driver is trying to push a 1500 kg loaded truck with an applied force of 5000 N. Unfortunately, his attempt was unsuccessful the truck stays stationary no matter how hard the driver pushes. How much work is done by the driver?

Selecciona una de las siguientes respuestas posibles:

Zero
F * x
F * t
- F * x

Explicación

Pregunta 10 de 10

1

Two heavy objects collide. Which of the following could be where their initial kinetic energies could be transferred?

Selecciona una o más de las siguientes respuestas posibles:

Sound
Heat
Friction
Surface Deformation
They exactly cancel each other out
The energies pass through the other car

	Creado por Ryan Elwell hace casi 7 años

Work, Energy and the link between the two.

Week 7: Work and Energy Capabilities

Pregunta 1 de 10

Work is the product of:

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 10

Rellena los espacios en blanco para completar el texto.

A woman carries a 5 kg box of clothes to donate into the shop. If she walks a horizontal distance of 10 meters from her car to the shop door, how much work has gravity done on the box? First blank is the numerical value. The second blank is for the units. W =

Explicación

Pregunta 3 de 10

Rellena el espacio en blanco para completar el texto.

How much potential energy does a 1 kg textbook have if it is thrown to a height of 5 meters? (Use a value of 10 for the acceleration due to gravity) U = J

Explicación

Pregunta 4 de 10

A book is dropped and slams loudly onto a desktop. Compare the kinetic energy at the bottom to the potential at the top of its motion.

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 5 de 10

Rellena el espacio en blanco para completar el texto.

What is the kinetic energy of a 1000 kg car moving at 10 m/s? KE = J

Explicación

Pregunta 6 de 10

In order to life a 1 kg book to a height of 2 m, how much work must be done? Use a value of 10 for the acceleration due to gravity.

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 7 de 10

Rellena el espacio en blanco para completar el texto.

How fast is a 5 kg ball moving the instant before striking the ground after it is dropped from a height of 4 meters? v = m/s

Explicación

Pregunta 8 de 10

A boy pushes a chair with a force of 25 N. If he exerts the force for 2 meters, how much work has he done on the chair?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 9 de 10

A truck driver is trying to push a 1500 kg loaded truck with an applied force of 5000 N. Unfortunately, his attempt was unsuccessful the truck stays stationary no matter how hard the driver pushes. How much work is done by the driver?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 10 de 10

Two heavy objects collide. Which of the following could be where their initial kinetic energies could be transferred?

Selecciona una o más de las siguientes respuestas posibles:

Explicación

A woman carries a 5 kg box of clothes to donate into the shop. If she walks a horizontal distance of 10 meters from her car to the shop door, how much work has gravity done on the box?

First blank is the numerical value. The second blank is for the units.

W =

How much potential energy does a 1 kg textbook have if it is thrown to a height of 5 meters? (Use a value of 10 for the acceleration due to gravity)

U = J

What is the kinetic energy of a 1000 kg car moving at 10 m/s?

KE = J

How fast is a 5 kg ball moving the instant before striking the ground after it is dropped from a height of 4 meters?

v = m/s