Forces
What is the SI unit of force?
Newtons
What is another name for Newton's 1st Law of Motion?
An object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a net external force
State the formula for Newton's 2nd Law of Motion.
F=ma
Define momentum
the quantity of motion of a moving body,
Define impulse in physics.
The sudden force acting on an object for a short interval of time (change of momentum)
Define the term "balanced forces."
When 2 forces cancel each other out on an object
Describe an example of an object at rest according to Newton's 1st Law.
It is not moving
Calculate the acceleration of an object with a force of 50N and a mass of 10kg.
5m/s^2
Explain the principle of conservation of momentum.
The momentum at the beginning is equal to the momentum at the end.
State the relationship between impulse and momentum.
the impulse applied to an object is equal to the change in its momentum
Explain the difference between mass and weight.
Mass - how much matter is in an object
Weight - gravitiational pull on an object
What is inertia ?
a tendency to do nothing or to remain unchanged.
How does the mass of an object affect its acceleration according to Newton's 2nd Law?
inversely proportional
How does the total momentum of a system change in the absence of external forces?
total momentum of the system is constant, or conserved
How does increasing the time of contact affect impulse?
Increasing the duration of a collision decreases the impulse
State Newton's third law of motion.
Every action has an equal and opposite reaction
Why is Newton's 1st Law also known as the law of inertia?
it tells that every material body has a property by virtue of which it resists the change in its state of rest or in its state of motion
If a force of 100N is applied to an object with a mass of 5kg, what is the resulting acceleration?
20m/s^2
Calculate the momentum of an object with a mass of 5kg moving at 10m/s.
50kgms
Calculate the impulse experienced by an object with a force of 50N acting for 5 seconds.
250kgms
How does friction affect motion?
It opposes motion ( is in the opposite direction of motion and slows an object down)
Explain the relationship between force, mass, and acceleration in Newton's 2nd Law.
Newton's second law is often stated as F = ma, which means the force (F) acting on an object is equal to the mass (m) of object times its acceleration (a). This means the more mass an object has, the more force you need to accelerate it, and the greater the force, the greater the object's acceleration.
what happens to momentum in collisions.
the total momentum before the collision is equal to the total momentum after the collision
Explain the significance of impulse in sports like long jump or shot put.
Nah just joking!!