Hello. I have a clarification about this question, "Which of the following is not an action/reaction force?". Your answer is Letter C. Hindi po ba Letter B? The attractive force between a falling apple and the earth" is not an example of an action/reaction force. It's a one-sided force acting on the apple. The Earth exerts a force on the apple, but the apple doesn't exert an equal and opposite force on the Earth. Also, Letter C is an example of action/reaction force. The force of propulsion pushes the airplane forward. The force of gravity pulls the airplane downward towards the Earth. Thank you.
Every force is the result of the interaction between two objects. Thus, a force always exists in pairs and cannot exist alone. Between the Earth and apple, both exert force against each other. If the action force is Earth pulling the apple downward, the apple exerts a reaction force against the Earth which is equal and opposite to the Earth’s gravity; so the reaction force is the apple pulling the Earth upward. We can see that the apple accelerates downward due to Earth’s gravity because the Earth’s gravity is large enough to accelerate the less massive apple. However, we cannot feel that the Earth accelerates upward because the force exerted by the apple (which is equal to the force exerted by the Earth on the apple) is not large enough to accelerate the more massive Earth or we may that the Earth’s acceleration due to the force exerted by the apple is almost negligible. Remember Newton’s 2nd law of motion, acceleration is inversely proportional to mass. Though the forces exerted both by the Earth and the apple against each other are equal, their accelerations are not the same.
For option C, the force of propulsion (which is the reaction force) that pushes the airplane forward is created by the action of the hot exhaust gases being expelled and not by the Earth’s gravity.
Thank you for the substantial explanation. I really appreciate it. This clarifies my concern. I thought that in letter B, only the Earth exerts a gravitational force pulling the apple downward, which is wrong. Apple also exerts an equal and opposite gravitational force, pulling the Earth upward. Thank you again.@@iredchannel
No 3 Question: two forces have magnitude of 15N and 8N. The sum of their magnitudes could NOT be equal to which of the following values? A 6N B. 7 N C. 10 N D. 23 N The greatest resultant force is when the two forces are acting in the same direction, and that is 15N + 8N = 23 N The lowest possible resultant force is when the forces are acting exactly in opposite direction, that is 15N - 8N = 7N Thus, the greatest possible net force is 23 N while the lowest is 7N. And any value between 7N and 23 N is possible. But any value lower than 7N or more than 23 N is not possible. Thank you. I hope it helps.
i hope this can help me in passing the entrance exam bc i wanted to join a science school at gr7, ty for the vid💙
Does everyone pass even if they are not smart .And they only need to study a lot to pass
By physics does it mean P.E
PE is short for potential energy which is defined as stored energy due to position
Hello. I have a clarification about this question, "Which of the following is not an action/reaction force?". Your answer is Letter C. Hindi po ba Letter B? The attractive force between a falling apple and the earth" is not an example of an action/reaction force. It's a one-sided force acting on the apple. The Earth exerts a force on the apple, but the apple doesn't exert an equal and opposite force on the Earth. Also, Letter C is an example of action/reaction force. The force of propulsion pushes the airplane forward. The force of gravity pulls the airplane downward towards the Earth. Thank you.
Every force is the result of the interaction between two objects. Thus, a force always exists in pairs and cannot exist alone. Between the Earth and apple, both exert force against each other. If the action force is Earth pulling the apple downward, the apple exerts a reaction force against the Earth which is equal and opposite to the Earth’s gravity; so the reaction force is the apple pulling the Earth upward.
We can see that the apple accelerates downward due to Earth’s gravity because the Earth’s gravity is large enough to accelerate the less massive apple. However, we cannot feel that the Earth accelerates upward because the force exerted by the apple (which is equal to the force exerted by the Earth on the apple) is not large enough to accelerate the more massive Earth or we may that the Earth’s acceleration due to the force exerted by the apple is almost negligible. Remember Newton’s 2nd law of motion, acceleration is inversely proportional to mass. Though the forces exerted both by the Earth and the apple against each other are equal, their accelerations are not the same.
For option C, the force of propulsion (which is the reaction force) that pushes the airplane forward is created by the action of the hot exhaust gases being expelled and not by the Earth’s gravity.
Thank you for the substantial explanation. I really appreciate it. This clarifies my concern. I thought that in letter B, only the Earth exerts a gravitational force pulling the apple downward, which is wrong. Apple also exerts an equal and opposite gravitational force, pulling the Earth upward. Thank you again.@@iredchannel
@@erythropoietin241 ❤️
Are you sure in no.3
No 3 Question:
two forces have magnitude of 15N and 8N. The sum of their magnitudes could NOT be equal to which of the following values? A 6N B. 7 N C. 10 N D. 23 N
The greatest resultant force is when the two forces are acting in the same direction, and that is 15N + 8N = 23 N
The lowest possible resultant force is when the forces are acting exactly in opposite direction, that is 15N - 8N = 7N
Thus, the greatest possible net force is 23 N while the lowest is 7N. And any value between 7N and 23 N is possible.
But any value lower than 7N or more than 23 N is not possible.
Thank you.
I hope it helps.