P10 Forces And Motion key INFO

Question 1

What is the equation to find the resultant force of an object?(N)(on equation sheet so do not worry)

Answer 1

Mass (kg) x acceleration(m/s squared)

Question 2

What is the letter equation for the reusltnat force of an object?

Answer 2

F= m x a

Question 3

What is the equation for momentum of a moving object?(on equation sheet so don’t worry)

Answer 3

Mass(kg) x velocity(m/s)

Question 4

What is momentum measured in?

Answer 4

Kg m/s)

Question 5

Is momentum a vector quantity?

Answer 5

Yes because it has size and direction

Question 6

What is Newton’s second law of motion?

Answer 6

The acceleration of an object is:

• proportional to the resultant force of an object
• inversely proportional to the mass of the object

Question 7

What is the conservation of momentum?

Answer 7

In a closed system, the total momentum before an event= total momentum after the event.

Question 8

What is the single letter equation for momuntum of a moving object?

Answer 8

P=m x v

Question 9

What changes the velocity of an object?

Answer 9

The resultant force

Question 10

What is interia?

Answer 10

The objects tendency to move at a constant speed or rest

Resultant force=0

Question 11

What is mass and what is it measured in?

Answer 11

The amount of matter in an object, kg

Question 12

What is weight and what is it measured in?

Answer 12

Force acting on an object from gravity, Newtons

Question 13

What is the equation for weight?

Answer 13

Mass x gravitational feild strength

Question 14

What is the stopping distance?

Answer 14

Distance covered when the vehincle is breaking (or the breaking force is upplied)until the object is stationary

Question 15

Want is the thinking distance?

Answer 15

The distance covered in the time it takes to react,ends when the breaks are applied.

Question 16

What is terminal velocity?

Answer 16

When the object reaches a constant velocity(velocity it reaches when its falling)

Frictional force is equal and opposite to the objects weight

(Resultant force=0)

Question 17

What is crucial for the conservation of momentum to work?

Answer 17

No exernal forces act on the object.

Question 18

If an object is elastic it____________

Answer 18

Returns to its original shape when the forces deforming it are removed.

Question 19

What is hooke’s law equation?

Answer 19

Force applied= spring constant k x extention (e)

F= k x e

Question 20

The stiffer the spring the…………

Answer 20

Stiffer the spring constant

Question 21

What is the extention of the string directly proportional to?

Answer 21

The force applied to it

Question 22

What does Hooke’s law state?

Answer 22

The extention of a spring is directly proportional to the force applied to it as long as its limiy of proportionality has not been exceeded.

Question 23

What is the spring constant?

Answer 23

How stiff the spring is

Question 24

The spring constant is equal to ………

Answer 24

Force per extention

If limit of proportionality has not been exceeded

Question 25

What is the opposite of elastic?

Answer 25

Plastic?