Explanation:
(c) I assume we're looking for mA.
Sum of forces on B in the -y direction:
∑F = ma
mBg − T = mBa
Sum of forces on A in the +x direction:
∑F = ma
T = mAa
Substitute:
mBg − mAa = mBa
mBg − mBa = mAa
mA = mB (g − a) / a
Plug in values:
mA = (5 kg) (10 m/s² − 0.01 (10 m/s²)) / (0.01 (10 m/s²))
mA = 495 kg
The answer key seems to have a mistake. It's possible they meant mB = 1 kg, or they changed mB to 5 kg but forgot to change the answer.
Answer:
True
Explanation:
With the gravitational pull that our planets have, we are able to remain in orbit. This demonstrates how every object in the galaxy is attracted to every other object. Every object in the universe that has mass exerts a gravitational pull on every other mass. We as humans do it too, but since our force isn't strong, we don't have much of an effect. I hope this helped and please don't hesitate to reach out with more questions!
W= F x dPower (formula)P= W/tForce (formula)F= m x anewton (N)the SI unit for force , equal to 1 kg*m/s2joule (J)<span>the SI unit of work, equal to 1 newton-meter</span>
Formula for stopping distance can be calculated by
here
now we can see from above equation that stopping distance depends on square of the speed.
So as we can see that here 30 mph and 60 mph, if the speed is double then the stopping distance will become four times more.
Answer: 7.5m/s2
Explanation:
Force applied = 540 N of force.
mass = 72.0kg
acceleration on the skates = ?
Recall that Force is the product of mass of an object and the acceleration by which it moves.
Force = mass x acceleration
540N = 72.0kg x acceleration
Acceleration = 540N/72.0kg
= 7.5m/s2