Physics

Question 1

What is Newton’s first law?

Answer 1

if Fnet=0, a=0
“Law of Inertia”
can be not moving, or moving at constant velocity

Question 2

What is Newton’s second law?

Answer 2

Fnet=ma

Question 3

What is a Newton?

Answer 3

measurement of force

(m/s^2)(kg) = N

Question 4

What is Newton’s third law?

Answer 4

“action-reaction” pair
for every action there is an equal and opposite reaction
**Remember: the forces act on DIFFERENT objects

Question 5

What is Newton’s law of gravitation?

Answer 5

every object of some mass can create a force of gravity
also called the “Inverse Square Law”
remember that the radius needs to be measured from the centre of the masses

Question 6

In which direction is torque positive?

Answer 6

counterclockwise

Question 7

In which direction is torque negative?

Answer 7

clockwise

Question 8

What is translational equilibrium?

Answer 8

Fnet = 0

Question 9

What is rotational equilibrium?

Answer 9

torque net = 0

Question 10

What is static equilibrium?

Answer 10

Fnet = 0
torque = 0
v = 0

Question 11

What is rotational inertia? What objects will have more rotational inertia?

Answer 11

objects will resist rotation

objects with mass further from centre of mass will have a higher rotational inertia

Question 12

Will you always hit a falling target if you aim for the right spot?

Answer 12

yes because they will have the same acceleration despite their masses

Question 13

When does an object with projectile motion have its max HORIZONTAL RANGE?

Answer 13

when theta is 45 degrees (Note: this isn’t make speed though!)