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velocitythe time rate of change of displacement of a body is known as velocity it is represented by v
speedthe distance covered by a body in unit time is known as speed it is represented by
unit and dimension of displacement the s1-unit of displacement is metre m the dimension of displacement is l or mo
explanationdisplacement is a physical quantity which defines the motion of a body from its starting position to its final position it is a vector
displacementthe change in the position of a body from its starting position to its final position is known as displacement it is denoted by d
motion a body is said to be in motion if it alters its position with respect to its
resta body is said to be at rest if it does not alter its position with respect to its
what is radioactivityradioactivity the process of spontaneous disintegration of the nuclei of heavy elements with the emission of certain radiations
a carbon steel plate thermal conductivity 45 wmoc 600 x 900 x 25 mm2 is maintained at 310oc air at 15oc bellows over the hot plateif convection heat
an army plane wants to drop supplies to a group of physics students stranded on an island in order for the package to land on the island the pilot
q helpful henrys car is pushing flat-tire freds car to the car shop while the cars are accelerating up to 15 mileshour helpful henry needs to push
q while rummaging in her backpack for her cell phone sallys mini-cooper rear ends joeys suburban sallys car is totaled while the suburban is fine if
qa rubber ball is dropped to the floor what force act on the ball to bounce does the earth bounce tooansthe force of the earth pushing back on the
q what action reaction pair is responsible for pushing a car forward ansthe wheels push back on the ground using friction while the ground then
tiger woods can hit a golf ball with 55 n of force how hard does the ball hit back on the club a more than 55 n of force b less than 55 n of force c
a passenger sitting in the rear of a bus claims that she was injured as the driver slammed on the breaks causing a suitcase to come flying towards he
q a truck loaded with sand accelerates along a highway if the driving force stays the same on the truck what happens to the trucks acceleration if
identify the action reaction pairs in the following situationsa
a space explorer is moving through space far from any star or planet he notices a large rock taken as a specimen from an alien planet floating around
when throwing a baseball a force is exerted by the hand on the balla is this force a contact force or a field force contact forceb throwing a ball
a small sports car collides head on with a massive trucka which vehicle will experience the maximum magnitude force the car the truck or
q if the net force acting on an object is in the positive x-direction the object moves only in the positive x-directionit is not true the object will
q if a single force acts on an object the object acceleratesyse it is definately
q if an object isnt moving no external force acts on it no it is always not true there