Our galaxy, the Milky Way, has a diameter of about 100,000 light years. How many years would it take a spacecraft to cross the g
1 answer:
You might be interested in
Answer:
(a) 300 ft
(b) 60 ft/s
Explanation:
distance where a is acceleration and t is time
Also, d=vt where v is the velocity
d=30t
Therefore
hence t=10 s
Substituting t is either formula
d=30t=30*10=300 ft
Also
v=at hence
Answer:
Work = 165670.4 J = 165.67 KJ
Explanation:
First, we will find the deceleration of the car, using the 3rd equation of motion:
where,
a = deceleration = ?
s = skid distance = 40 m
vf = final speed = 0 m/s
vi = initial speed = 17.2 m/s
Therefore,
the negative sign indicates deceleration here.
Now, we will calculate the braking force applied by the brakes on the car:
the negative sign indicates braking force.
Now, we will calculate the work done using the magnitude of this force:
<u>Work = 165670.4 J = 165.67 KJ</u>