Final answer:
The final velocity of a fireworks shell that accelerates from rest to 64 m/s is 64 m/s itself, as that is the speed it achieves after acceleration. Option b is the correct answer.
Step-by-step explanation:
The final velocity of a fireworks shell that is accelerated from rest can be determined using the formula:
vf = sqrt(2 * a * d)
Where:
vf is the final velocity
a is the acceleration
d is the distance
In this case, the final velocity is given as 64 m/s. Since the shell starts from rest, the initial velocity is 0. The distance traveled is not given, so we cannot directly calculate the acceleration. Therefore, we cannot determine the final velocity based on the information given.
The student has asked about the final velocity of a fireworks shell that is accelerated from rest. The given options include:
- 32 m/s
- 64 m/s
- 128 m/s
- 96 m/s
According to the information provided, the fireworks shell accelerates from rest to a velocity of 64 m/s. Since 'rest' means the initial velocity is zero, the final velocity will be the velocity the object has achieved after the acceleration period, which is given as 64 m/s. Thus, the correct answer is (b) 64 m/s.