Question

multiple select question
select all that apply
consider a ball is thrown upward with a force p. if the ball is to accelerate, then which of the following forces must be smaller than the force p?
initial force
air resistance
gravity
final force

Explanation:

Step1: Define net force condition

For upward acceleration, net upward force must be positive: $P - (F_g + F_{air}) > 0$, where $F_g$ = gravity, $F_{air}$ = air resistance.

Step2: Analyze each force

• Initial force = $P$, so it is not smaller.
• Rearranged net force: $F_g + F_{air} < P$, so both $F_g$ and $F_{air}$ are smaller than $P$.
• Final force (at peak, velocity=0, $F_{air}=0$; acceleration downward, so final net force is downward, meaning upward force (if any) is less than $P$, but the key is gravity and air resistance must be smaller than $P$ for initial upward acceleration.

Answer:

B. Air resistance
C. Gravity