Forces 2 *

Question 1

How do you calculate the weight?

Answer 1

weight = mass x gravitational field strength (10)

Question 2

Is momentum a scalar or vector quantity?

Answer 2

vector - has dircetion and magnitude

Question 3

How do you calculate momentum?

Answer 3

momentum = mass x velocity

Question 4

What is the rule for conservation of momentum? (in a closed system)

Answer 4

total momentum before = total momentum after

Question 5

What is a closed system?

Answer 5

something that is not affected by external forces

Question 6

What are the 4 types of momentum collision?

Answer 6

• an object hitting another object (transferring momentum)
• two objects moving towards each other and colliding (total momentum before = total momentum after)
• an object hitting another object and joining together (total momentum before = total momentum after)
  3) explosions (two objects moving apart due to a force

Question 7

What happens to the momentum if there is a resultant force acting on it?

Answer 7

there is a change in momentum

Question 8

What is newton’s third law?

Answer 8

for every action, there is an equal and opposite reaction

Question 9

Newton’s third law

Fill the gaps:

In every interaction, there is a pair of _____ of the ____ ____acting
the ____ of the _____ on the first object equals the ____ of the _____ on the second object, but in the ________ directions

Answer 9

In every interaction, there is a pair of forces of the same type acting
the size of the force on the first object equals the size of the force on the second object, but in the opposite directions