Forces
What is the unit measure of force?
Newtons
Motion is the action of changing location or position?
A pipe closed at one end and open at other will give
All odd harmonics
Find the momentum of a round stone weighing 12.05kg rolling down a hill at 8m/s.
96.4 kg x m/s down hill
describes current in a parallel circuit?
It stays the same throughout
Newtons first law of motion is called?
Law of Inertia
What slows down the motion of an object or keeps it from starting?
friction
To raise the pitch of a stringed musical instrument, the player can?
Lossen the string
A cannon ball weighing 35kg is shot from a cannon towards the east at 220mls, calculate the momentum of the cannon ball.
7700 kg x m/s east
What happens to the voltage in a parallel circuit?
It splits up across each component
What is the sum of all the forces acting on an object called?
Net force
When two objects interact, what can we say about the forces acting?
When two objects interact, they always exert equal and opposite forces on each other.
large amplitude of sound vibrations will produce?
loud sound
A javelin is thrown into a field at 18m/s. if the Javelin weighs 1.5kg, what is the momentum?
27 kg x m/s into the field
describes voltage in a series circuit?
It splits up across each component
How much net force is required to accelerate a 2000 kg car at 3.00 m/s2?
The net force needed is 4000 N.
What is deceleration?
Deceleration is the change of velocity per second when an object slows down.
sound is produced due to?
vibration
A bullet weighing 350g is shot towards a target at a velocity of 250m/s. Calculate the momentum of the bullet
87.5 kg x m/s towards target.
magnetism is the power to?
attract
If you apply a net force of 3 N on 100 g-box, what is the acceleration of the box?
30 m/s2
How can we calculate the acceleration of an object?
Acceleration=change of velocity/time taken.
sound is slowest in?
liquid
Which of these object has greater momentum, a 2kg truck moving east at 3.5m/s or a 4.3kg truck moving south at 1.5m/s?
The momentum of first object = 2 x 3.5 = 7; momentum of second truck = 4.3 x 1.5 = 6.45. First truck has more momentum at 7 kg x m/s moving east.
what object is attracted to magnets?
all metals