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Question

If all of the forces acting on an object balance so that the net force is zero, then
(A) the object must be at rest
(B) the object’s speed will decrease
(C) the object’s direction of motion can change, but not its speed
(D) None of the above will occur.

Khoobchandra Agrawal · Accepted Answer

if Net Force zero then acceleration is zero. That is, velocity is constant. Magnitude. Yeah, and direction of Felicity remains construct. Hence the answer is G none of them.

Donald Albin · Answer

According to Newton&#x27;s second law, the some of the forces equals mass times acceleration. So if the forces are unbalanced than this will be greater than zero and that&#x27;s going to create acceleration, so the answer is a.

Eve Rafferty · Answer

this question takes a look at net forces on a moving object. So it gives us three different options and says, and that force must be acting with an object. Accelerates changes direction, but not speed. All changes speed, but not direction. So let&#x27;s take a look at each of these cases individually. So from object to accelerate, it must have a force applied to it. And we can see this from the formula f equals M A, where efforts the Force M is the marks and a is the acceleration. So for body to accelerate, it needs a net falls to be applied to it. Let&#x27;s take a look at the second case. It changes direction, not speed. So we have an object that is moving this way, and it wants to change direction, but not speed. Well, we&#x27;re gonna have to have a force acting on this object to make a change direction. So you have to have a net force a acting this way for the object to then move in this direction. But at the same speed of a final case is that it changes speed but not direction again. If we say that an object is moving in this direction is not gonna change direction this town, but to increase its speed, it has to be acted on by a net force.

Abhishek Jana · Answer

so we can take an example off uniform circular motion. So let&#x27;s let&#x27;s assume that an object is moving in the uniform circular motion with, ah, constant speed. So even if the object is moving in a circular motion with the constant speed, the velocity is changing every moment because the velocity is the direction, Um, which makes a tangent at the point of the circle. So at each point, the attendant is different. So that&#x27;s why the direction of the velocity exchanging. Although the magnitude remains constant, so the velocity is constant. In that case, option is true. No, the object is, as we mentioned, that changing the object is changing its direction. So that means auction bees true as well. But we&#x27;ll come back to Option C because ax elation is not cereal here. So we have to see if that condition satisfies here or not. But we see that the centripetal force is the net force acting on the object, and that&#x27;s greater than zero. So that means d seems to be true also from the work energy theorem. We see that since the object is moving so we only have kind of energy here and the the kinetic energy is changing. So the change in kinetic Sorry, the kind of again it is not changing here because the velocity is constant. So that means the next change in kinetic energy and the network are both zero. So that means he&#x27;s through. So the only option that seems not true is option C where ax elation is here. So I mean, as we see here, that ax elation is nausea because the very sentimental acceleration which is acting towards the center, so the option C seems to be the answer.

Ze-Han Lee · Answer

So in this problem, uh, we have four statements. So in the 1st 8 many states that Ava objects center rations, counted it, then muster moving the straight line. So this is not right because he gave you threw a ball from the ground and see that the acceleration is constant. Which evil G but to the movement is not straight line. All right, it&#x27;s ah, it&#x27;s a projectile. So in part B in the choice B, I says even objects acceleration zero. Then the speed might must have returned. Constant constant. That s o This is right. So the choice bees, right. His choice, eh? And chose. C says that if the object of speed return constant, then the generation must be zero. This is not right. So if you look at ah ah, circular moat if you look at the second movement, so see that to the the The speed is a constant, but to the acceleration is no zero. There is a fine it. Ah, centripetal acceleration. Okay. And in part d say&#x27;s, uh if the objects of direction of the movement is changing the acceleration zero, that&#x27;s that. Is that this is right. Okay,

Ze-Han Lee · Answer

All right. So in this problem we have throwing, We have thrown object upward. And when this object, the riches the highest point. So the acceleration, I mean, the net force acting on this ah object of steel the gravity all rights to M G. And in the whole process, acceleration is constant and it is equal g and putting down.

Problem

A block of mass m is at rest on a frictionless, h…

Problem 7 Easy Difficulty

If all of the forces acting on an object balance so that the net force is zero, then
(A) the object must be at rest
(B) the object’s speed will decrease
(C) the object’s direction of motion can change, but not its speed
(D) None of the above will occur.

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