i know this might seem kind of long. but if you could please help me, i'd greatly appreciate it.
a. suppose you have a tug of war with a friend who is the same size and weight as you are. You both pull as hard as you can, but neither of you seems to be winning. You move a little one way or the other, but mostly you are just at rest (although sweating some). Compare the magnitude of the force exerted by you on your friend, with the magnitude of the force exerted by your friend on you. Are they the same or different? If they are not the same, which is larger? Why or why not?
b. Now you have a tug of war with your kid sister (who is much smaller and lighter than you). Again you both pull hard but end in a standoff with neither of you moving much. Compare the magnitude of the force exerted by you on your sister, with the magnitude of the force she exerts on you. Are they the same or different? If they are not the same, which is larger? Why or why not?
c. The next tug of war is still with your kid sister but she is now standing on her skateboard. You can now make her roll across the floor (with constant speed) when you pull hard. In this situation compare the magnitude of the force exerted by you on your sister, with the magnitude of the force she exerts on you. Are they the same or different? If they are not the same, which is larger? Why or why not?
d. Now you pull your sister across the floor so that she moves with increasing speed (accelerates). Compare the magnitude of the force exerted by you on your sister, with the magnitude of the force she exerts on you. Are they the same or different? If they are not the same, which is larger? Why or why not?
e. Due to the drivers not paying attention, a small car and a big truck collide, both are initially moving at 5mph towards each other. Compare the magnitude of the force the truck exerts on the car to the magnitude of the force the car exerts on the truck. Which vehicle would you rather ride in? Describe why you made your choice.
i know a and b are equal.
but for c-e. some ppl say they are all equal because newton's third law says so.
but some say they are not equal.
for example for e. the force is going towards the car because the truck has a greater force.
can someone please help me.
In all cases they are equal and opposite. In some of your cases, the force causes one or in e, both to accelerate. That does not mean the magnitude of the force is different on each. The force just has a different effect on each.
In part e, the car acceleration is much greater than the truck acceleration for the same force on both, so ride in the truck.
You posted this twice. I answered already, attempting to get you to learn how Newton's Third Law applies, and I agree with Damon.
okay. but for D. there is acceleration. can you explain.
seriously dude i need to finish this prelab
remember, even if F is the same (which it always is in a collision), mass and acceleration may not be. smaller mass = greater acceleration because F = F and
ma = ma, so if one mass is smaller, its a must be larger to equalize with the other side.
A 4.2 kilo b
Bag of surgar is on a counter how much work is required to put the bag on a shelf a distance of 0.60 m above the counter. J
Sure, I'd be happy to help explain these concepts to you.
In physics, the concept of force is governed by Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. This means that when two objects interact, they exert equal and opposite forces on each other. Now let's apply this to the different scenarios you provided:
a. When you and your equally sized friend are engaged in a tug of war and are at rest, the magnitude of the force you exert on your friend and the force your friend exerts on you are the same. This is because the forces are equal and opposite, as per Newton's Third Law. So, both forces are equal.
b. In the scenario with your smaller sister, the magnitude of the force you exert on your sister and the force she exerts on you are still the same. Again, this is because of Newton's Third Law. So, both forces are equal.
c. Now, when your sister is standing on a skateboard and you pull her, causing her to move with a constant speed, the magnitude of the force you exert on your sister and the force she exerts on you are still equal. This is because both forces are necessary to maintain the constant speed, and they are equal and opposite as per Newton's Third Law. So, both forces are equal.
d. However, in the scenario where you pull your sister across the floor and she accelerates (moves with increasing speed), the force you exert on your sister and the force she exerts on you are not the same. The force you exert on your sister is greater than the force she exerts on you. This is because you are applying an additional force to overcome the friction and accelerate your sister. The force she exerts on you is smaller because she has less mass and hence less ability to exert a force.
e. In the case of the collision between a small car and a big truck, the magnitude of the force the truck exerts on the car is the same as the magnitude of the force the car exerts on the truck. This is again due to Newton's Third Law. While the truck may have a greater force, it is also experiencing the same magnitude of force from the car. As for which vehicle you would rather ride in, it would be subjective and depend on various factors such as safety features, structural integrity, and other considerations.
In summary, Newton's Third Law states that the forces between objects are equal and opposite, which means that the magnitude of the force one object exerts on another is the same as the magnitude of the force the other object exerts back. However, it's important to note that the effects of these forces can differ depending on the mass and acceleration of the objects involved.