Science Tri 2 Professor Dave Explains Video
Q: Force must be applied to initiate motion for an object in: earth's atmosphere outer space the ocean all of the above
A: All of the above
Q: What is Newton's First Law of Motion?
A: An object at rest will remain at rest and an object in motion will remain in motion unless acted upon by some external force
Q: Define Newton's 1st Law:
A: An object will preserve its state of motion unless acted upon by some external net force. It's called the law of inertia. Under Newton's 1st Law, if the Net Force on an object is ZERO, there will be NO motion.
Q: Define Newton's 3rd Law of Motion
A: For every action, there is an equal and opposite reaction. There can NEVER be a single isolated force, since forces always come in pairs.
Q: What is the relationship between mass and inertia?
A: It an object has greater mass, it requires more inertia to initiate or stop its motion. For example, it would take more inertia to stop a freight train than a VW bug.
Q : Mass is a measurement of what?
A: Mass is a measurement of an object's inertia, whether at rest or in motion.
Q: What is the relationship between mass and force?
A: More mass means more force is required to start or stop an object moving. For example, the ping pong ball moves more easily than a bowling ball. The bowling ball requires more force.
Q: When a bowling ball strikes a bowling pin, which imparts a greater force upon the other?
A: Neither. They impart an equal force upon each other
Q: How do you define Net Force?
A: Net Force is the vector sum of all the individual forces operating on an object
Q: What is the unit measure related to Force?
A: Newtons F= ma Heavier objects require more force to accelerate Also Lighter objects require less force to accelerate
Q: Is there friction in space?
A: No. There is no friction in space. Therefore, an object like a satellite or even planets would stay in constant motion.
Q: Define inertia
A: The capacity of an object to resist changes in motion. Force is required to initiate or terminate motion. In the absence of force, constant velocity would be maintained.
Q: When a bowling ball strikes a bowling pin, which experiences a greater acceleration?
A: The pin, because it has much less mass
Q: The inertia that an object possesses depends on its velocity mass volume none of the above
A: mass
Q: Define Newton's 2nd Law of Motion
Force = Mass x Acceleration F = m x a
