Category
📚
LearningTranscript
00:00hi kids today we will learn about the role of forces in our daily lives so
00:08let's get started kids everything we do in our daily lives
00:15requires some forces even if we are standing or sitting some forces are
00:22acting on us opening a door which is a simple activity and it requires the
00:32muscular force to rotate the doorknob cycling now let's see how many forces
00:40are required while cycling first one is the applied force the one who is
00:47is applying his muscular force to move the paddles then is the friction friction
00:55is a force that always opposes any motion when two surfaces are in contact
01:02with each other so here the friction force is between the surface of the road
01:07and surface of tires if there would be no friction between the tires and the
01:15road the tires will keep on moving very fast and even slip off it is because of
01:22this friction or the opposing force that we can balance the tires friction force
01:30is also acting between your hands and handles if there would be no friction it
01:37would slip off from your hands friction force is also there between the sole of
01:43your shoes and the paddles if there would be no friction your shoes will
01:49slip off from the paddles everywhere where there is a grip it is because of
01:55the friction next force acting here is gravity force of gravity pulls the cycle
02:03downwards there is also a force acting from the ground which is pushing it
02:10upwards so there are different forces acting while we are running a bicycle
02:16gravity is pulling down ground is pushing upward friction is opposing the movement
02:25applied force or muscular force is moving it forward let's see another example let's see
02:34forces acting while we are hammering a nail applied force or muscular force is pushing
02:42the nail into the wall and friction it is opposing the movement now let's see forces
02:50acting while we are running we are applying muscular force to move forward gravity is
02:59pulling us downwards friction as we know friction is the opposing force for any
03:05movement so it opposes our movement and also prevents us from slipping on the road air
03:13resistance is also a type of friction that is posed by the air and prevents anything moving
03:21and decreases the speed of the moving object now let's see forces acting while we are playing a
03:31striker game we apply muscular force or apply force to move the striker ahead friction friction
03:41is always there when the two objects are in contact and here the striker and the board is
03:49in contact so the smoother the board the lesser will be the friction and the rougher the board
03:58the more will be the friction here the surface of the board is very smooth so it possesses little
04:08friction and the striker goes very far now let's see forces acting in this table fan mechanical
04:19force blades of the fan are moving fast through the mechanical force of the motor inside the fan
04:26moving air force moving air has force that blows away the lighter objects in front of it and here
04:37are the forces acting while rowing a boat let's see muscular force we are using the muscular force
04:46to move the oar of the boat to pull the water backwards and move the boat forwards friction
04:54it is because of friction that we can hold anything firmly we can hold the oar because
05:01of the friction between our hands and the oar if the oar is slippery or the hands are slippery
05:10we cannot hold it gravity gravity pulls the boat downwards buoyancy makes the boat float
05:20so kids we use forces and everything we do intentionally or unintentionally now you may
05:30go ahead and take a quiz to learn more bye-bye