Phy Sci, Ch 12, Forces and Motion, Sec 1-3, Quiz

A 20-kg object has a net force of 30 Newtons acting on it. What is its acceleration? 

• 10 m/s^2
• 50 m/s^2
• 0.67 m/s^2
• 1.5 m/s^2

What is true about an object in equilibrium? 

• It is not accelerating.
• The net force is zero. 
• All forces are balanced. 
• All of these. 

A 5-kg ball hits a wall with an acceleration of 10 m/s². What is the force acting on the ball? 

• 50 N
• 2 N
• 15 N
• 5 N 

What can NEVER happen if an object has a net force equal to zero acting on it?

• It can never have a constant velocity.
• It can never have an acceleration. 
• It can never have a balanced force. 
• All of these. 

 If you are pulling a wagon to the right, in what direction is the force of friction acting?

• upwards
• downwards
• left
• right

What happens to the acceleration of an object if the force acting on it is increased?

• Nothing.
• It is zero.
• It increases. 
• It decreases. 

What happens to the acceleration of an object if the force acting on it is decreased?

• Nothing. 
• It is zero.
• It increases.
• It decreases. 

What is the nickname for Newton's First Law of Motion?

• F=ma
• Law of Inertia
• Law of Equilibrium
• Action-Reaction 

What is the nickname for Newton's Second Law of Motion?

• F=ma
• Law of Inertia
• Law of Equilibrium
• Action-Reaction

What is the nickname for Newton's Third Law of Motion?

• F=ma
• Law of Inertia
• Law of Equilibrium
• Action-Reaction