14 Questions
Which of the following is true about a lever?
It is free to rotate about a fixed axis
What is the unit of moment?
Nm
If two parallel forces with the same magnitude act in opposite directions, what are they called?
Couple
What is the torque of a couple equal to?
The magnitude of one force multiplied by the distance between them
What is the SI unit of pressure?
Pa
Which law states that any two point masses in the universe attract each other with a force proportional to the product of their masses and inversely proportional to the square of the distance between them?
Newton's Law of Universal Gravitation
What instrument is used to measure the density of a liquid based on how deeply it sinks into the liquid?
Hydrometer
In free fall, an object experiences acceleration due to gravity causing it to accelerate. What is this called, eventually it reaches a speed such that it accelrates no more, what do we call this?
Terminal velocity
What principle states that when a body is immersed in a fluid, it experiences an upthrust equal to the weight of the fluid displaced?
Archimedes Principle
What happens when a diver experiences 'The Bends'?
Formation of nitrogen gas bubbles in their bloodstream due to a change in pressure
What is a fulcrum?
A fixed point around which a rigid body can rotate
What is density defined as?
Mass per unit volume (m/V)
What factor affects how deeply a hydrometer sinks in a liquid?
Density of the liquid
What is the relationship between pressure and depth in a fluid?
Pressure increases with depth
Learn about moments in physics, focusing on how it is calculated using the force and the perpendicular distance to the fulcrum. Understand the concept of a fulcrum and how it relates to the turning effect of a force.
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