How can this system be brought to equilibrium?

a) add a 5 n force acting in the same direction as the 10 n force.

b) add a 10 n force acting in the same direction as the 10 n force.

c) add a 10 n force acting in the same direction as the 20 n force.

d) add a 20 n force acting in the same direction as the 20 n force.

a car's position in relation to time is plotted on the graph. what is the car's average velocity?

a) 5 m/s

b) 10 m/s

c) 30 m/s

d) 50 m/s