Missing question content is atteched.
Answer:
•
• Velocity of tightend is 2times greater than that of linesman while velocity of halfback is thrice that of linesman.
• The halfback and tightend have the greatest momentum.
Explanation:
We are given:
= 3m/s
Therefore, considering the fact the distance covered by the tightend is twice that of the linesman in same period of time, it means the speed of tightend is 2 times faster than the linesman, the velocity of the tight end will be:
= 2 * 3m/s = 6m/s
For the halfback:
The distance covered by the halfback is 3times that covered by the linesman in same period of time, it means the speed of the halfback is thrice greater than that of the linesman.
Therefore, the velocity of the half back will be:
= 3 * 3m/s = 9m/s
• To find momentum, we use:
P = m * v
Therefore,
Momentum for halfback:
= 60kg, v = 9m/s
= 60kg * 9m/s = 540kg.m/s
Momentum for tightend =
90kg * 6m/s = 540kg.m/s
Momentum for linesman=
120kg * 3m/s = 360kg.m/s
We can see that the tightend and halfback have the greatest momentum, with a momentum of 540kg.m/s. While the linesman has the lowest momentum, with a momentum of 360kg.m/s
Answer:
a.
Explanation:
Remeber speed and velocity are the same concept, it just speed is scalar, meaning it doesn't have a direction nor it negative.
So technically thr car had a constant speed over 75 seconds.
If thr car has a constant speed, the car isn't speeding up or slowing down so it has accleration of 0 so the answer is a.
Answer:
Frequency – The frequency of a wave is the number of waves that pass a given point in a certain amount of time. Frequency is measured in units called hertz (Hz), and is defined as the number of waves per second. A wave that occurs every second has a frequency of 1 wave per second (1/s) or 1 Hz.
Initial velocity (u) = 90km/hr = 90/3.6 m/s = 25m/s
final velocity (v) = 18km/hr = 18/3.6 m/s = 5m/s
acceleration = (v-u)/t = (5-25)/4 = -5 m/s2
change in momentum = m(v-u) = 1200(5-25) = -24000 kg•m/s
F = ma = 1200 x -5 = -6000 N
Answer:
yes
Explanation:
because it has the potential to move