Semester 2 Quiz 1

Question 1

Energy

- Work is the

Answer 1

Transfer of energy by mechanical means

Question 2

What are the types of energy

Answer 2

PE- reserved energy

KE- energy of motion

Question 3

Law of conservation of energy

Answer 3

Overall energy of a system can’t change

Question 4

Calorie/calorie

Answer 4

Energy needed to increase 1Kg/1 G of water by 1C at atm

Question 5

Calorie deals with

Answer 5

Kg

Question 6

calorie deals with

Answer 6

g

Question 7

1 Calorie is

Answer 7

4184 Joules(food)

Question 8

1 calorie is

Answer 8

4.184 joules

Question 9

How many Calories in 1 pound of fat

Answer 9

3500Calories

Question 10

Work-Energy Theorum

Answer 10

Work being done by net external force

Question 11

Power

Answer 11

The rate of doing work

Question 12

Work def

Answer 12

The product of a force acting over a distance

Question 13

If an object moves in the same direction as a net force

Answer 13

Positive work is done

Question 14

If an object moves in the opppiste direction of a net force

Answer 14

Negative work is done

Question 15

Fr, Dr

Answer 15

Force resistance (machine)

Question 16

Fe, De

Answer 16

Force effort(you)

Question 17

Mechanical advantage def

Answer 17

The factor by which a machine multiples the Fe.

Question 18

MA>1

Answer 18

Force is increased

Question 19

1st class lever

Answer 19

Fulcrum is in middle, forces ,once in opposite directions

Question 20

2nd class lever

Answer 20

Fulcrum is at end, forces move in same direction at opposite end, Fr in middle

Question 21

3rd class lever

Answer 21

Fulcrum is at edge, forces on opposite end, Fe in middle