Here is question related to physics one, Can you please give at least one line e

Question

Here is question related to physics one, Can you please give at least one line explaining Thanks 1. (5 points) An object rests on a horizontal frictionless surface. A net horizontal force of magnitude 0 only if F is larger than the weight of the object 0 only while the object suddenly changes from being at rest to being in motion O always 0 only if the inertia of the object decreases 0 only if F is increasing 2. (5 points) A brick slides on a horizontal surface. Which of the following will increase the frictional force on it? Putting a second brick on top O Decreasing the surface area of contact O Increasing the surface area of contact O Decreasing the mass of the brick O None of the above 3. (5 points) The amount of work required to stop a moving object is equal to the: O velocity of the object kinetic energy of the object O mass of the object times its acceleration O mass of the object times its velocity O square of the velocity of the object d. (6 points) A force on a partide is conservative if 4. (5 points) A force on a particle is conservative if: O its work equals the change in the kinetic energy of the particle O it obeys Newton's second law O it obeys Newton's third law O its work depends on the end points of the motion, not the path bet ween O it is not a frictional force 5. (5 points) If the total momentum of a system is changing: O particles of the system must be exerting forces on each other O the systern must be under the influence of gravity the center of mass must have constant velocity O a net external force must be acting on the system 0 none of the above

Explanation / Answer

you have asked multiple questions.I can only answer 3.Please raise different question for others

1) it will always  produces an acceleration

answer is C

2)by putting a second brick on top ,it will increase the frictional force

answer is A

3)The amount of work required to stop a moving object is equal to the  kinetic energy of the object

W=-delta K.E

answer is B

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