Answer:
0.775 m
Explanation:
As the car collides with the bumper, all the kinetic energy of the car (K) is converted into elastic potential energy of the bumper (U):
![U=K\\frac{1}{2}kx^2 = \frac{1}{2}mv^2](https://tex.z-dn.net/?f=U%3DK%5C%5Cfrac%7B1%7D%7B2%7Dkx%5E2%20%3D%20%5Cfrac%7B1%7D%7B2%7Dmv%5E2)
where we have
is the spring constant of the bumper
x is the maximum compression of the bumper
is the mass of the car
is the speed of the car
Solving for x, we find the maximum compression of the spring:
![x=\sqrt{\frac{mv^2}{k}}=\sqrt{\frac{(30\cdot 10^4 kg)(2.0 m/s)^2}{2\cdot 10^6 N/m}}=0.775 m](https://tex.z-dn.net/?f=x%3D%5Csqrt%7B%5Cfrac%7Bmv%5E2%7D%7Bk%7D%7D%3D%5Csqrt%7B%5Cfrac%7B%2830%5Ccdot%2010%5E4%20kg%29%282.0%20m%2Fs%29%5E2%7D%7B2%5Ccdot%2010%5E6%20N%2Fm%7D%7D%3D0.775%20m)
A person's weight will change if they move from Earth to the moon.
<h3>Hope this helps, sorry if not tho</h3><h3>Do you want to go live on the moon?</h3>
Answer:
b
Explanation:
I think im not really sure tho
Answer:
86.6, 45°
Explanation:
The diagram explains better.
Using vector component method:
We find the x and y components of the vectors :
For the first:
A = -50cos(0)i + 50sin(0)j
A = -50i
For the second:
B = -50cos(60)i + 50sin(60)j
B = -25i + 43.3j
The resultant vector is :
R = A + B
R = -50i - 25i + 43.3j
R = -75i + 43.3j
The magnitude is:
R = [(-75)² + (43.3)²]^½
R = 86.6m
The angle is
tanθ = (50/50) = 1
θ = 45°
Answer: D
Explanation: Because the orginal Penalty stroke is Today's field hockey topic is the exciting penalty stroke! What is a stroke? A penalty stroke occurs when an intentional foul happens in the penalty circle (the circle around the goal), the foul prevents a scoring of a opportunity.