Forces
True or false: a force is a push, pull or twist.
True.
This is also called the law of inertia.
Newton's 1st law.
Define displacement.
Change in position of an object.
Define momentum
The product of mass and velocity.
True or False: Earth is at the center of the Universe.
False.
Newtons
What is the assumption made when stating Newton's second law as F=ma?
Mass is constant.
Define angular velocity.
The rate of change of angular displacement.
State the SI units for momentum.
Ns or kgm/s
How many modules does the Tiangong have?
Three.
This force comes about because surfaces in contact have peaks and troughs.
Friction.
In Newton's 3rd law, if the action force is the Earth's force of gravity on an object, what is the reaction force?
The object's force of gravity on the Earth.
What does the area under an acceleration time graph represent?
Change in velocity.
What's an isolated system in physics?
One whose net external force is zero.
Three of these particles are found in a neutron.
Quarks.
This type of force is a consequence of Hooke's law
Elastic restoring force.
What happens to a falling parachutist at the instant they deploy their parachute?
They slow down.
What physical quantity is numerically equal to the angular speed?
Angular frequency.
What's the condition for conservation of momentum?
The net external force is zero.
What is defined as the work done per unit charge in transforming electrical energy into other forms?
Potential difference.
This type of force is produced from the cohesion of matter and is perpendicular to the surface upon which it arises
State the original form of Newton's second law.
The rate of change of momentum.
What's the acceleration of a balloon at the istant that it is released, 13.5m above the ground?
9.8m/s^2
What two conditions are necessary for an elastic collision?
Conservation of both kinetic energy and momentum.
Which particle is responsible for aquisition of mass by other particles
The Higgs Boson