si unit and si base unit of force

dynamics topic 3

Flashcard
•
Physics
•
1st - 5th Grade
•
Hard
Niranjana sunil
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16 questions
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1.
FLASHCARD QUESTION
Front
Back
newton, kg m s^-2
2.
FLASHCARD QUESTION
Front
def and types of ocntact and non contact forces
Back
contact foces act when two interacting objects have phsyical contact over each other including ncf, friciotnal force, drag froce and elastic froce
non contact forecs act over a distance without physical contact between two interacting object and include gf, magnetic force and electrical force
3.
FLASHCARD QUESTION
Front
define weigth and mass and all specific deets
Back
weight is the force of gravity acting on a body and it s is a vector quantity hence varies with position. si unit is newton and a calibrated spring balance is used to measure it
mass us the amount of matter in a body and it is a scalar quantity hence does not vary with position and it has the si unit of kg and it is measured using comparison with standard mass like electronic mass balance
4.
FLASHCARD QUESTION
Front
define gracitational field, gravitational field strength
Back
gravitational field is the region in which a mass experiences a force due to gravitational acceleration.
gravitational field strength is the gravitational force per unit mass (9.81 n kg^-1)
5.
FLASHCARD QUESTION
Front
weight forumla
Back
w= mg
6.
FLASHCARD QUESTION
Front
define inertia
Back
inertia refer tot he resistance of a body to resist a change in the state of rest or motion of the body
7.
FLASHCARD QUESTION
Front
define normal contact force + characteristics
Back
normal contact force is the perpendicular force exerted by the surface of one object on the surface of another when they are in physical contact and it prevents the objects from passing through each other
1. only exists when an obj is in contact with sth else
2. alw perpendicular to contact surface and its direction is through obj of interest
3. does not alw pass through the CG of obj
4. not alw equal too weight of obj (when obj is on slope, vertical acceleration --> up is more n, down is less n) other vertical forces)
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