SPLBE 2016

Question 1

may be defined as any influence with tends to change the motion of an object

Answer 1

force

Question 2

the four fundamental forces in the universe

Answer 2

• gravity force
• electromagnetic force
• nuclear weak force
• strong force

Question 3

force which holds nucleus together

Answer 3

strong force

Question 4

range of strong force in meters

Answer 4

10^-15 (diameter of a maximum sized nucleus)

Question 5

strength of strong force

Answer 5

1

Question 6

strength of electromagnetic force

Answer 6

1/137

Question 7

range of electromagnetic force in meters

Answer 7

infinite

Question 8

strength of nuclear weak force

Answer 8

10^-0

Question 9

range of nuclear weak force in meters

Answer 9

10^-18 (0.1% of the diameter of protons)

Question 10

strength of the force of gravity

Answer 10

6x10^-39

Question 11

range of the force of gravity in meters

Answer 11

infinite

Question 12

what is the SI unit of force

Answer 12

newton

Question 13

1N is equal to

Answer 13

1kgm/s^2

Question 14

newton’s first law of motion

Answer 14

the law of inertia: states that if the body is at rest, it will remain in motion with constant speed in a straight line unless there is a net force acting upon it
f=0

Question 15

newton’s first law of motion

Answer 15

the law of inertia: states that if the body is at rest, it will remain in motion with constant speed in a straight line unless there is a net force acting upon it
{f=0}

Question 16

newton’s second law of motion

Answer 16

law of acceleration: if a net force “F” acting on the body of mass “m” is not zero, the body acceleration “a” is proportional to the force and inversely proportional to the mass of the body

Question 17

acceleration formula in terms of force

Answer 17

a=f/m

Question 18

newton’s law of gravitation

Answer 18

states that the force on a spherical object of mass m1 due to the gravitational pull of mass m2 is:

f=Gm1m2/r^2

Question 19

what is the constant value of gravity

Answer 19

6.67408×10-11Nm2/kg2

Question 20

is the product of force and the time it acts

Answer 20

impulse

Question 21

impulse formula

Answer 21

I=Ft

Question 22

is the product of the mass and the velocity of the body

Answer 22

momentum

Question 23

momentum formula

Answer 23

P=mv

Question 24

is equal to the change in momentum

Answer 24

impulse-momentum theorem

Question 25

impulse-momentum theorem formula

Answer 25

Ft=mv2-mv1

Question 26

the law of conservation of momentum

Answer 26

when two bodies of masses m1 and m2 collide, the total momentum before impact is equal to the total momentum after impact

Question 27

equation for the law of conservation of momentum

Answer 27

m1v1+m2v2=m1v1+m2v2

Question 28

occurs when two or more objects hit each other

Answer 28

collisions

Question 29

concept of collisions

Answer 29

when objects collide, each object feels a force for a short amount of time. This force for a short amount of time. This force impart an impulse, or changes the momentum of each of the colliding objects. But if the system of particles is isolated, we know that momentum is conserved. Therefore, while the momentum of each individual particle involved in the collision changes, the total momentum of the system remains constant