static equilibrium concept

If an object is stationary or moving with constant velocity

• Only two force with different direction are acting on the object

• No force are acting on the object

• The net force acting on the object is not zero

• The net force acting on the object is zero

An object being pushed with a constant velocity 5 ms^-1 along a horizontal floor. What is the net force acting on the object?

• 0 N

• 0.5 N

• 5 N

• 50 N

Which statement is true regarding the equilibrium condition of a rigid body?

• A net force and torque acting on the body is not equal to zero

• The net force and torque acting on the body is equal to zero

• The net force acting on the body is equal to zero but the net torque is not equal to zero

• A. The net force acting on the body is not equal to zero but the net torque is equal to zero

What is rigid body?

• body which does not change its shape on impact by outside force

• Body that remain stationary

• Body which change shape when force apply

• product of force and perpendicular distance from the line of force to the selected points

static friction is

• friction that cannot change event the body moving

• friction between two surfaces after relative motion occurs

• friction between two surfaces before relative motion occurs

• the force that opposes the relative motion of two surfaces in contact