1.5 forces

Question 1

Define force and its SI unit

Answer 1

force is a push or pull exerted by one object to another force
unit is Newton (N)

Question 2

what are the different type of forces

Answer 2

weight
upthurst
tension
thurst
air resistance
electrostatic force
magnetic force
contact force
friction

Question 3

Define newton’s first law of motion

Answer 3

Newton’s first law of motion states that the object will remain at stationary if it was stationary before and the object will continue to move at the same velocity if it was moving

Question 4

Define newton’s second law of motion

Answer 4

Newton’s second law of motion states that the acceleration of an object is directly proportional to the applied force for a fixed mass and inversely proportional to the mass for a fixed force

Question 5

Define newton’s third law of motion

Answer 5

Newton’s thrid law of motion states that whenever two bodies interact the forces they exert on each other are equal and opposite

Question 6

Define resultant force

Answer 6

may change the velocity of an object by changing its direction of motion or its speed

Question 7

equation of force

Answer 7

force = mass × acceleration or
F = ma