QUESTION 1: While the speed of the toy car was decreasing, what can you say abou
ID: 1573383 • Letter: Q
Question
QUESTION 1: While the speed of the toy car was decreasing, what can you say about the tendency of the two interactions involved
The tendency of interaction with the hand to increase the kinetic energy of the cart wasstronger than the tendency of the interaction with the carpet to decrease its kinetic energy.
The tendency of interaction with the hand to increase the kinetic energy of the cart wasequal to the tendency of the interaction with the carpet to decrease its kinetic energy.
The tendency of interaction with the hand to increase the kinetic energy of the cart wasweaker than the tendency of the interaction with the carpet to decrease its kinetic energy.
A.The tendency of interaction with the hand to increase the kinetic energy of the cart wasstronger than the tendency of the interaction with the carpet to decrease its kinetic energy.
B.The tendency of interaction with the hand to increase the kinetic energy of the cart wasequal to the tendency of the interaction with the carpet to decrease its kinetic energy.
C.The tendency of interaction with the hand to increase the kinetic energy of the cart wasweaker than the tendency of the interaction with the carpet to decrease its kinetic energy.
Explanation / Answer
While the speed of the toy car was decreasing it is clear that the deaccelerating force would be greater than the accelerating force.
Here push through hand is accelerating force and frictional force due to carpet is deaccelerating force. Also the kinetic energy will be directly proportional to the force applied.
Hence,
The tendency of interaction with the hand to increase the kinetic energy of the cart will have to be weaker than the tendency of the interaction with the carpet to decrease its kinetic energy in order to decrease the velocity of the toy car.
Therefore ,
C. is the correct choice.