Define force.
A push or pull acting on an object, measured in newtons.
What is mass?
The amount of matter in an object, measured in kilograms.
True or false: Weight is the mass of an object multiplied by gravity.
TRUE
Weight varies with gravitational pull; on Earth, it’s about 9.81 m/s².
Fill in the blank: Energy is the ability to ______ work.
do
What is kinetic energy?
The energy an object possesses due to its motion.
Define potential energy.
The stored energy of an object due to its position or state.
What is the law of conservation of energy?
Energy cannot be created or destroyed, only transformed.
True or false: Friction always acts to increase motion.
FALSE
Friction opposes motion, slowing down moving objects.
What is work in physics?
The energy transferred when a force moves an object over a distance.
Fill in the blank: Power is the rate of doing ______.
work
Define acceleration.
The rate of change of velocity of an object.
What is Newton’s first law of motion?
An object at rest stays at rest unless acted upon by a force.
True or false: Gravity is a force that attracts two masses.
TRUE
Gravity depends on the masses and distance between them.
What does momentum depend on?
The mass and velocity of an object.
Fill in the blank: Sound travels fastest in ______.
solids
