PHYSICS W3 FORCE AND NEWTON

What is the SI unit for force?

• 6 N

• 4 N

• 10 N

• 5 N

What is the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line?

• Inertia

• Frictional force

• Gravitational force

• Normal force

What is the direction of the frictional force?

• Opposite to the direction of motion of the object and parallel to the surface

• In the normal direction

• Perpendicular to the surface

• Towards the center of the earth

What is the value of the static friction force when two surfaces are in contact with each other and do not move with each other?

• Always zero

• Constant value

• Always maximum value

• Varies from zero to reaching its maximum value

What is the kinetic friction coefficient?

• 15

• 8

• 5

• 10

If the resultant force acting on an object is not equal to zero, then the object will?

• Remain at rest

• Decelerate

• Accelerate

• Move

What is the relationship between the magnitude of acceleration and the mass of the object according to Newton's 2nd Law?

• Proportional to the frictional force

• Inversely proportional to the resultant force and directly proportional to the mass of the object

• Proportional to the pull force

• Directly proportional to the resultant force and inversely proportional to the mass of the object

What is the direction of the acceleration with respect to the resultant force?

• Same as the resultant force

• Opposite to the resultant force

• Perpendicular to the resultant force

• Parallel to the resultant force

What is the reason for astronaut A to move backwards after pushing astronaut B according to Newton's 3rd Law?

• Astronaut B reacts to astronaut A

• Astronaut A delivers action

• Astronaut A and B are in equilibrium

• Astronaut A is heavier than astronaut B

What is the SI unit of Inertia and Mass?

• Pascal (Pa)

• Joule (J)

• Newton (N)

• Kilogram (kg)