Share Grade 7 EoT 3 Review
Save to Folder
When describing motion, what do we call the starting location or position of an object?
reference point
The distance and direction of an object from a reference point is called __________.
position
__________ is defined as the measure of distance divided by time.
speed
What kind of forces act on an object that is accelerating?
unbalanced forces
What is the total net force of balanced forces?
Zero
What is the meaning of force?
push or pull
What is the unit used to measure force?
Newtons
What effect does the surface of an object have on the amount of friction created by the object?
the rougher the surface, the greater the friction
The weight of the object is 80 N. What is the normal force?
80 N
What is the relationship between kinetic energy and mass?
if the mass increases the kinetic energy increases; they are proportional
What is the relationship between kinetic energy and speed?
if the speed increases, then the kinetic increases by the square of the speed
What is the relationship between height and gravitational potential energy?
the greater the height the greater the gravitational potential energy
Gravitational potential energy depends on _____ and _____.
mass and height
How do you know if work is being done on an object?
a force is applied and the object moves
Why does electric current not flow in an open circuit?
because the circuit is incomplete
Why is rubber not used to make electrical wires?
because it is an insulator
