Forces Test Flashcards
Force is measured in what?
Newtons (N)
An advantage of friction?
Shoes gripping the road - you’re not slipping
Disadvantage of friction?
New shoes rubbing against feet - gives a blister
4 main contact forces?
Push, pull, twist, tear
Name a piece of scientific equipment (apparatus) which helps determine the mass (in g) and the force (in N).
Spring balance
What is a type of lubricant that reduces friction?
Oil
Name types of balanced forces.
Laying down, standing up, sitting.
Name types of unbalanced forces.
Skipping, walking, jumping, running, writing.
Balanced forces are a situation in which there is change or no change?
No change
What is the net force of a balanced force?
0N.
An unbalanced force is a situation which there is change or no change?
Change
Is there net force in an unbalanced force?
Yes, there is always an overall net force.
What is net force?
Net force is the force acting on an object. Net force is calculated when one or more forces are being applied to an object.
What is a non contact force?
Non contact forces are forces that act on an object without any physical interaction.
Name 3 types of non contact forces.
Gravitational force, magnetic force, electrostatic force.
Name metals that can become magnets.
Iron, cobalt, nickel.
Name the two types of magnets.
Permanent and temporary magnets.
What is the black rod which is charged up with wool? Does it become positive or negative?
Ebonite, it is charged up with wool to become a negative charge.
What is the clear rod that is charged up with silk? Does it become a positive or negative charge?
Perspex, it is charged up with silk to become a positive charge.
What is an electromagnet?
An electromagnet is a metal object which is turned into a magnetic force by coils wrapped around it which produce electricity, forming an electric current.
Is a substance that loses electrons positively or negatively charged?
Positively charged.
Is a substance that gains electrons positively or negatively charged?
Negatively charged.
How can you strengthen an electromagnet?
Increase the voltage or the amount of coils.
What is mass? What is it measured in?
Mass is the amount of matter in an object. It is usually measured in grams, kilograms, etc.
What is weight? What is it measured in?
Weight is the measurement of force exerted by the gravity on an object. It is measured in Newtons.
