Force and Power

Emmet needs to wreck a building with a wrecking ball. The ball accelerates at 26 m/s/s, arriving at its 30 meters away destination in 34 seconds, and has a mass of 3,000 kg.  How much work is this ball doing?

• 2,340,000 Joules

• 44,225,463 newtons

• 44,325,473 newtons

• 44,235,464 newtons

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

If you can only work 42 Joules because you're simply EXHAUSTED and you only have 19 seconds to do all that work how much power are you going to use?

• 1.2

• 4

• 2.21

• 3.55

Tags

NGSS.MS-PS3-5

How do you calculate force?

• Kinetic Energy

• Time

• Acceleration

• Distance

• Mass

Tags

NGSS.MS-PS2-2

Jack is calculating mechanical advantage. He puts in 100% of his force to his homework (45 Newtons) but for some reason only 15 Newtons come out. What is the MA?

• 3

• 1/3

• 3.1415926535...

• 346

_______ is a push or a pull that is measured in Newtons.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

If I am applying 17 N of force over 3 meters how much work is being done?

• 17N / 3m = 5.67 N /m

• 17N / 3m = 5.67 J

• 17N x 3m = 51 N x m

• 17N x 3m = 51 J

Tags

NGSS.MS-PS3-5

If 51 J of work is being done in 20 seconds, how much power is being done?

• 51J / 20s = 2.55 J/s

• 51J / 20s = 2.55 W

• 51J x 20s = 1020 Jxs

• 51J x 20s = 1020 W

Tags

NGSS.MS-PS3-5

When you apply force to a machine it is called_______.

• output force

• input force

• output distance

• input distance

_________ is the measure of the amount of work that can be done in a given amount of time

________ is done when you use force on an object

Tags

NGSS.MS-PS3-5