B, acceleration of free fall is always 9.81 regardless of the mass of an object, in this case they just round 9.81 to 10ms-2. They try to trick you but must remember change from potential to kinetic and acceleration due to free fall are not dependent on the mass of an object.
For example if two people jumped out of a plane and they have different masses they would reach the bottom at the same time and the same speed
B, acceleration of free fall is always 9.81 regardless of the mass of an object, in this case they just round 9.81 to 10ms-2. They try to trick you but must remember change from potential to kinetic and acceleration due to free fall are not dependent on the mass of an object.
For example if two people jumped out of a plane and they have different masses they would reach the bottom at the same time and the same speed
ie the top one falls at 9,81ms-2 and the bottom one doesn't move
Spoiler
Well the spring in that video only shows that sort of movement because the spring is plasticly deformed and wants to return to its original position, so in this case there is an extra force, tension, acting downwards for the top of the spring but not the bottom. However, in the question this is a piece of string not a spring which does not show any plastic/ elastic deformation so it is not necessarily trying to return to its original position so i would still go with B as the downward forces are the same for both.
I'm sure the person has the answers to the questions he is attempting because there would be no point otherwise.
Well the spring in that video only shows that sort of movement because the spring is plasticly deformed and wants to return to its original position, so in this case there is an extra force, tension, acting downwards for the top of the spring but not the bottom. However, in the question this is a piece of string not a spring which does not show any plastic/ elastic deformation so it is not necessarily trying to return to its original position so i would still go with B as the downward forces are the same for both.
I'm sure the person has the answers to the questions he is attempting because there would be no point otherwise.
ah okay that kind of makes sense , I didn't want to answer OP directly as I really wasn't sure
The answer to 16 is A, we have only recently done this in Physics, it is perpendicular to the force provided by the tension in the wire, not the weight of the horizontal bare
EDIT: I didn't notice the above posting before I posted my input, sorry!
The answer to 16 is A, we have only recently done this in Physics, it is perpendicular to the force provided by the tension in the wire, not the weight of the horizontal bare
EDIT: I didn't notice the above posting before I posted my input, sorry!
I still dont quite get it. What's the opposite force for reaction force in the diagram? As i see it, the tension is keeping it up and the weight keeping it down. Is the reaction force to oppose the horizontal force from the tension?
It's ampere, that's just knowledge that you have to learn. If you look up fundamental SI units, it will make more sense. I think they are units from which anything can be devised from?
It's ampere, that's just knowledge that you have to learn. If you look up fundamental SI units, it will make more sense. I think they are units from which anything can be devised from?
I meant second question in topic, not in the link. Apologies,