Answer:
D) accelerate but will not spin.
Explanation:
On the off chance that there is no air resistance the object will accelerate yet won't turn, this is on the grounds that without air resistance same force is applied on each bit of the object. Force on each segment is coordinated descending i.e parallel force. So there is no force to deliver spin movement in it.
It will accelerate because of gravity
Answer:
3.60342 seconds
Explanation:
v = Initial velocity of snowball = 25 m/s
g = Acceleration due to gravity = 9.81 m/s²
= First angle = 75°
The second angle will be
Horizontal speed for first throw
Horizontal speed for second throw
Horizontal range is given by
Time period for first throw
Time period for second throw
The time difference is
The second ball should be thrown 3.60342 seconds later
The answer is C. From the yolk to the white.
The net force on the block perpendicular to the floor is
∑ F[perp] = F[normal] - mg = 0
so that
F[normal] = (5 kg) g = 49 N
Then
F[friction] = 0.1 F[normal] = 4.9 N
so that the net force parallel to the floor is
∑ F[para] = -4.9 N = (5 kg) a
Solve for the acceleration a :
a = (-4.9 N) / (5 kg) = -0.98 m/s²
Starting with an initial velocity of 5 m/s, the box comes to a stop after time t such that
0 = 5 m/s - (0.98 m/s²) t
⇒ t ≈ 5.1 s
