Answer:
The correct answer is A.
Objects in free fall accelerate due to <u>gravity</u>.
Explanation:
Momentum can help an object to keep its state of motion at a constant velocity when no external force is applied. It can never accelerate the object.
According to the laws of motion, we know that acceleration is produced in a body only when a Force is applied in the direction of motion of body.
During a free fall, only the force of gravity is acting on an object and that too in the direction of its motion. Hence, the acceleration produced in a free falling object is due to gravity.
first object gors highest
second object goes lowest.
Explanation:
work = force ×distance
1 w = ? f= 200 d= 1.3
w = f ×d
=200×1.3
= 269 joule
2 w=? f=40. d=6
w= 40/6
= 240 joule
3. w=? m=254. f= ? d=3
w=f=mg. f= 254×10. f= 2540
w=f×d
=2540×3
= 7620 joule
Answer:
0.231 N
Explanation:
To get from rest to angular speed of 6.37 rad/s within 9.87s, the angular acceleration of the rod must be
If the rod is rotating about a perpendicular axis at one of its end, then it's momentum inertia must be:
According to Newton 2nd law, the torque required to exert on this rod to achieve such angular acceleration is
So the force acting on the other end to generate this torque mush be:
