Question 1:
Explain the concept of inertia.
Answer:
Inertia is the tendency of an object to remain at rest or, if moving, to continue its motion in a straight line at uniform velocity.
Explain the concept of inertia.
Answer:
Inertia is the tendency of an object to remain at rest or, if moving, to continue its motion in a straight line at uniform velocity.
Question 2:
Brian wishes to pull a table cloth without toppling the things on top of the table cloth.
How can Brian do it? Explain your answer.
Answer:
Brian must pull the tablecloth very quickly to prevent the objects on top of the tablecloth moving along with it.
The inertia of the objects on the table keep them in their original position (resting position).
If the tablecloth is pulled slowly, the frictional force between the objects and the tablecloth is great enough to accelerate the objects together with the tablecloth.
Brian wishes to pull a table cloth without toppling the things on top of the table cloth.
How can Brian do it? Explain your answer.
Answer:
Brian must pull the tablecloth very quickly to prevent the objects on top of the tablecloth moving along with it.
The inertia of the objects on the table keep them in their original position (resting position).
If the tablecloth is pulled slowly, the frictional force between the objects and the tablecloth is great enough to accelerate the objects together with the tablecloth.
Question 3:
Study the following statements:
Statement 1: Objects can continue moving only if a force acts on them.
Statement 2: Rockets in outer space can move without any engine thrust.
Statement 3: Force is required to change the state of motion of objects.
(a) Which of the statements can be explained correctly using Newton’s First Law of Motion?
(b) Give reasons of your choice.
Answer:
(a) Statement 2
(b) Newton’s First Law of Motion states that an object at rest will remain at rest, and an object in motion will continue to move at a constant velocity in a straight line, unless acted upon by an external force. In other words, objects in motion tend to keep moving in the same direction and at the same speed, and objects at rest tend to stay at rest, unless acted upon by some force.
When a rocket is initially launched, it uses engines to generate thrust and accelerate it into outer space. Once it reaches its desired velocity and altitude, the rocket can turn off its engines, and continue to move forward at a constant speed due to its own inertia. There are no external forces acting upon the rocket to slow it down or change its direction, so it continues to move forward in a straight line at a constant velocity until acted upon by some other forces.
Therefore, even without engine thrust, a rocket in outer space can continue to move due to its own inertia, in accordance with Newton’s First Law of Motion.
Study the following statements:
Statement 1: Objects can continue moving only if a force acts on them.
Statement 2: Rockets in outer space can move without any engine thrust.
Statement 3: Force is required to change the state of motion of objects.
(a) Which of the statements can be explained correctly using Newton’s First Law of Motion?
(b) Give reasons of your choice.
Answer:
(a) Statement 2
(b) Newton’s First Law of Motion states that an object at rest will remain at rest, and an object in motion will continue to move at a constant velocity in a straight line, unless acted upon by an external force. In other words, objects in motion tend to keep moving in the same direction and at the same speed, and objects at rest tend to stay at rest, unless acted upon by some force.
When a rocket is initially launched, it uses engines to generate thrust and accelerate it into outer space. Once it reaches its desired velocity and altitude, the rocket can turn off its engines, and continue to move forward at a constant speed due to its own inertia. There are no external forces acting upon the rocket to slow it down or change its direction, so it continues to move forward in a straight line at a constant velocity until acted upon by some other forces.
Therefore, even without engine thrust, a rocket in outer space can continue to move due to its own inertia, in accordance with Newton’s First Law of Motion.