Answer:
4.3 m/s
Explanation:
a = rate at which the automobile loses speed = - 7.2 m/s²
v₀ = initial maximum speed of automobile
t' = reaction time for applying the brakes = 0.55 s
d = distance available for stopping the vehicle = 3.6 m
d' = distance traveled while applying the brakes = v₀ t' = (0.55) v₀
v = final speed after the vehicle comes to stop = 0 m/s
Using the equation
v² = v₀² + 2 a (d - d' )
0² = v₀² + 2 (- 7.2) (3.6 - (0.55) v₀)
v₀ = 4.3 m/s
Answer:
he difference between the positions of the two events as measured in S = 4.42 x 10 8 m
Explanation:
The concept of time dilation is applied to solve the question as shown in the attachment.
Answer:B. two larger, less stable nuclei
Explanation: They collied and don't combine
P = m * v
v = {3i - 4j} = square root (3^2 + 4^2) = 5
P = 20 * 5
P = 100 kg m/s