Answer:
I'm pretty sure that the answer is C. Hope this helps.
Explanation:
The car gets accelerated to 10 m/s² to reach the final velocity of 65 m/s from 30 m/s in 3.5 seconds.
Answer:
Option C.
Explanation:
Acceleration is the ratio of change in velocity to the time taken to reach the final velocity. As here the initial velocity of car is given as 30 m/s and the final velocity is given as 65 m/s. So to reach this final velocity the car is taking a time of 3.5 seconds.
Thus, acceleration = change in velocity/Time
Acceleration = (65-30)/3.5 = 10 m/s²
So the car gets accelerated to 10 m/s² to reach the final velocity of 65 m/s from 30 m/s in 3.5 seconds.
Answer:
Yes
Explanation:
In 4 minutes, machine M produces x widgets
In 20 minutes, machine M produces 5x widgets
Assuming x = 1, in 20 minutes machine M produces 5 widgets
In 5 minutes, machine N produces y widgets
In 20 minutes, machine N produces 4y widgets
Assuming y = 1, in 20 minutes machine N produces 4 widgets
Machine M produces 1 more widget than machine N in 20 minutes assuming x=1 and y=1
The mechanical impulse, of a force, is a vectorial magnitude that relates this force to the duration of its performance.
We have then:
I = F * delta t.
Since the impulse is a vector, we can then calculate the vector sum as:
I = ((20) * (0.2)) - ((0.4) * (2)) + ((24) * (0.05))
I = 4.4 N.s
Then, by definition:
I = delta p
I = delta m * v
I = m * delta v
I = m * (v-0)
Clearing v:
v = I / m
v = (4.4) / (0.10)
v = 44 m / s
answer:
the final velocity of the hockey puck is
v = 44 m / s
