Newton's Laws - Sheet1

Question 1

force

Answer 1

a push or pull on an object

Question 2

friction

Answer 2

force between two objects when they are touching and in motion

Question 3

weight

Answer 3

pull of gravity on an object measured in newtons

Question 4

acceleration

Answer 4

change in velocity over time

Question 5

newton

Answer 5

the unit by which force is measured

Question 6

inertia

Answer 6

resistance of an object to a change in it’s motion

Question 7

free body diagram

Answer 7

a diagram representing forces on an object

Question 8

newtons 1st law

Answer 8

an object in motion stays in motion and an object at rest stays at rest unless acted on by an unbalanced force

Question 9

newtons 2nd law

Answer 9

an unbalanced force causes a mass to accelerate

Question 10

newtons 3rd law

Answer 10

for every action, there is an equal and opposite reaction

Question 11

air resistance

Answer 11

the resistance force acting on an object as it falls through the air

Question 12

equilibrium

Answer 12

a state of physical balance

Question 13

net force

Answer 13

all forces added together

Question 14

balanced forces

Answer 14

forces that are equal in magnitude and opposite in direction

Question 15

applied force

Answer 15

a push or a pull on an obect caused by another object

Question 16

static friction

Answer 16

frictional force resisting the start of motion

Question 17

kinetic friction

Answer 17

friction between objects in motion

Question 18

equation for newtons 2nd law

Answer 18

f=ma

Question 19

mass

Answer 19

amount of matter that makes up an object

Question 20

A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them. Which of Newton’s Laws does this represent?

Answer 20

Ist Law, which is also called the law of inertia

Question 21

Generally, pushing a child on a swing is easier than pushing an adult on the same swing. Which on Newton’s Laws does this represent?

Answer 21

Newton’s 2nd Law

Question 22

If the net force on an object is zero, the object is either ____________or _____________.

Answer 22

moving with constant velocity or at rest