Answer:
90m/s
Explanation:
Given parameters:
Acceleration = 10m/s²
Time of fall = 9s
Unknown:
Final velocity = ?
Solution:
We can assume that the cart falls from rest.
Initial velocity = 0m/s
Using
v = u + gt
v is the final velocity
u is the initial velocity
g is the acceleration due to gravity
t is the time
v = 0 + 10 x 9 = 90m/s
ANSWER
C. 5 seconds to 7 seconds
EXPLANATION
This is a velocity time graph.
We can read the final velocity, v,the initial velocity u and the time easily from the graph.
See attachment for the initial and final velocities on each time interval.
So we can use either of the following equations to calculate the distance traveled.
Or
.
During the time interval 0 to 3, the distance traveled is,
.
During the time interval 3 to 5 seconds, the distance traveled is,
.
During time interval, 5 to 7 seconds the distance traveled is,
.
During time interval 7 to 8 seconds the distance traveled is
.
During time interval 8 to 10 seconds the distance traveled is
.
The correct answer is C.
Answer:
See the answers below.
Explanation:
The cost of energy can be calculated by multiplying each given value, a dimensional analysis must be taken into account in order to calculate the total value of the cost in Rs.
The fuse can be calculated by knowing the amperage.
where:
P = power = 350 [W]
V = voltage = 240 [V]
I = amperage [amp]
Now clearing I from the equation above:
The fuse should be larger than the current of the circuit, i.e. about 2 [amp]
Answer: There is no specific amount of time.
Explanation:<em>If</em> it takes 7 miles to get somewhere you could be there, or if it is night, you might hit a deer so, it might take even longer.
Answer:
The values of q must be large and m small to obtain the best possible velocity resolution (the narrowest distribution of velocities of the transmitted particles).
Explanation:
Based on Newton's law of motion, the formula for force is as below:
f = ma ---------------------------1
But a = a = v²/r
so, f = mv²/r -------------------2
Also, f = qE --------------------3
From the equations above, it is observed that the values of q must be large and m small to obtain the best possible velocity resolution (the narrowest distribution of velocities of the transmitted particles).