(P8) Forces, Newton's Laws, Electromagnets, & the Universe

Forces that occur when objects touch each other

• contact forces

• non-contact forces

• gravity

• magnetism

Why does a compass needle point toward a wire that is carrying a current?

• wire with a current creates a magnetic field, attracting the magnetic compass needle

• the compass needle is made of metal and is attracted to the wire

• electrical currents attract metal

• compass needles do not point toward a wire carrying an electrical current

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What happens to the MASS of an object when it leaves Earth?

• stays the same

• changes

• nothing

Why is understanding the gravity on other planets essential for manned missions?

• To predict how humans will adapt to the gravity levels.

• To predict how humans will find jobs.

• To predict how long it will take to get to other planets.

• To predict how much food to take on the voyages.

Tags

NGSS.MS-PS2-4

Choose all forces that act on a boulder sitting still on the ground.

• no forces

• gravity

• ground

• push to the left

Tags

NGSS.MS-PS2-4

Which forces are balanced?

• vertical

• horizontal

• none

• both

Choose all of the ways to increase the effect of the magnetic field of an electromagnet.

• move object closer to electromagnet

• add additional power sources

• wrap more coils of wire

• wrap the coils of wire closely together

Tags

NGSS.MS-PS2-3

Which of Newton's Laws of Motion reads: An object in motion remains in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

• 1st law

• 2nd law

• 3rd law

What factors affect the gravitational force between two objects?

• mass and distance

• mass and gravity

• distance and type of object

• mass and weight

Tags

NGSS.MS-PS2-4

A tennis ball is bounced on the ground. Choose all of the positions that are best described by this free-body diagram.

• held up high

• dropping

• bouncing up

• on the ground

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS3-5