L6 🧠 using newtons law

Which is NOT true of a car crash?

• it can be explained by newton's first law

• seatbelts loosen to decrease the time it takes it slow the passengers down

• Unbelted passengers travel at the car’s original speed after the collision.

• Airbags provide a cushion that reduces acceleration of the passengers.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

which statement is not true

• If gravity is the only force, an object’s acceleration is the force of gravity divided by the object’s mass.

• Air resistance is a friction-like force

• Air resistance depends on the speed of an object

• The more spread out an object is, the less air resistance it will experience.

Which is the term for the maximum speed an object will reach when falling through a substance?

• Terminal speed

• Terminal velocity

• free fall

• weightless velocity

which term describes an object with only the force of gravity acting on it

• Terminal velocity

• resistant

• propulsion

• free fall

Which statement is True

• A rocket engine exerts a force on hot gases and causes them to escape out the back of the rocket

• The gases exert a force on the rocket and push it forward.

• Momentum is conserved when a rocket ejects the hot gas.

• All of the above

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2