John Loads A Collapsed Inflatable Boat Into A Two-wheel "grocery Type" Handcart. He Used An 8 Foot Long Board To Lengthen The Underside Of The Cart, The End Of The Board Serves As A New Extended Handle For His Cart.Now When He Goes To Pull His Longer Cart, He Is Pulling With The Cart At A 20-degree Angle (much Closer To The Ground Than Before). Based On What You Read Above The Direction Of Force And Movement , What Will Happen?
a. the cart will be even harder to pull now because it is lower to the ground
b. the cart will be even harder to pull now because of the extra weight of the board
c. The cart will be easier to pull, in spite of the weight of the board, because now the angle of the pull is much closer to the angle of movement.
d. there is no real change because it takes the same amount of to pull a given amount of weight no matter how you pull it
To be honest, if I were on drugs, I might be able to read your question. As it is, it is just confusing to read. Sorry.
The correct answer is c. The cart will be easier to pull, in spite of the weight of the board, because now the angle of the pull is much closer to the angle of movement.
By using the longer board to extend the underside of the cart, John has effectively lowered the cart closer to the ground. This results in a decrease in the angle between the direction of force (pulling) and the direction of movement.
When the angle between the direction of force and the direction of movement is larger, it requires more force to overcome the resistance and move the object. Conversely, when the angle is smaller, it requires less force to move the object. In this case, since the cart is now pulling at a 20-degree angle (closer to the ground than before), the angle of the pull is much closer to the angle of movement. This alignment of forces makes it easier for John to pull the cart.
The weight of the board itself does add some additional weight to the cart, but the impact of this extra weight is overshadowed by the improved alignment of forces when pulling the cart.