Do Now 11-12-18

It took 50 joules to push a chair 5 meters across the floor. With what force was the chair pushed?

• 250 N

• 10 J

• 10 N

• 250 J

Tags

NGSS.MS-PS2-2

units of force are

• newtons

• grams

• joules

• meters

units for work are

• netwons
• joules
• meters
• seconds

Tags

NGSS.MS-PS3-4

if you push a cart with a force of 60 N for 2 m... how much work have you done

• 120 J
• 30 J
• 120 N 
• 30 N

No work is said to be done in a situation where a force is applied to an object and -

• the object does not move.

• friction acts on the object.

• the object changes shape.

• gravity pulls on the object.

The table shows the amount of force four students used to push a box different distances.

Which two students performed the same amount of work?

• Student Q, Student R

• Student S, Student T

• Student Q, Student T

• Student R, Student S

What is the definition of power?

• the amount of work an object does
• the rate at which force is applied
• the amount of matter in an object
• the rate at which work is done

What is the unit of measurement for Power?

• Joules
• Newtons
• Watts
• Meters

What is the equation for power?

• P = Work/time
• P = Force/time
• P = time/distance
• P = Work * time

What is the power of a kitchen blender if it can perform 3,750 joules of work in 15 seconds?

• 56250 W

• 56 kW

• 4 W

• 250 W