Force and Laws of motion

Define Force ?

• Any push on an object is known as force

• Any pull on an object is known as Force

• Any push or pull on an object is known as force

What is balanced force ?

• The force acting on a body is zero then the force in called balanced force .

• If the resultant force of all the force acting on the body is not zero then the force is balanced force .

Newton's first law is also known as

• Law of inertia

• Law of motion

• Law of direction

What is the correct equation of second law of motion ?

• F= ma

• A = am

• F = m-a

• f = m+a

A person force falling on a cemented floor get injured but a person falling on a heap of sand is not injured . Which law is used here ?

• First law of motion

• Second law of motion

• Third law of motion

A karate player breaks the pile of the tiles or bricks with a single blow . Which law is applied here ?

• First law

• Second law

• Third law

Which is an example of first law of motion ?

• When a tree is vigrously shakes some of it's leaves fall from the tree .

• Huge damage to the train takes place when a moving train suddenly colloid against a stationary train .

Defination of momentumn is the motion of a body is known as momentumn .

• True

• False

A motorcar is moving with a velocity 108km/hr and it takes 4 seconds to stop after the break is applied . Calculate the force exerted by the beaks on the motorcar if it's mass along the passenger is 1000kg .

• -7850 kg m/s2

• -7500 kg m/s 2

• -8000 kg m/s 2

A constant force acts on an object of mass 5kg for a duration of 2 seconds . It increases the object velocity from 3m/s to 7m/s . Find the magnitude of the applied force . Now if the force was applied for the duration of 5 seconds , what would be the final velocity of the object ?

• 15 m/s

• 14m/s

• 12m/s

• 13m/s