The image of the thin square metal plate showing the force and the lines are missing, so i have attached it.
Answer:
Line B represents the lever arm
Explanation:
From the attached image, we can see 4 different dashed lines between the force F and the moment centroid O.
Now, we want to know which of the dashed lines represents lever arm.
Now, in physics/engineering, the lever arm which is also known as moment arm is defined as the perpendicular distance between the line of action of the acting force and the centre of the moments.
Now, from the image attached, the only dashed line that is perpendicular to the acting Force F and the moment centre O is Line B.
Thus,line B represents the lever arm
Answer:
F = 7 N
Explanation:
given,
mass of sled = 17.5 Kg
speed of snow on horizontal surface = 3.5 m/s
time taken to stop = 8.75 s
initial momentum
= m U
= 17.5 x 3.5 = 61.25 Kg.m/s
final momentum
final velocity = 0 m/s
final momentum = 0
impulse = change in momentum
impulse = force x time
equating both the formula of impluse
F x t = 61.25 - 0
F x 8.75 = 61.25
F = 7 N
Force acting on the moving sled is equal to F = 7 N
Answer:
Your body just being crushed from the side. With a side-impact we see much more severe injuries to the thorax and upper-body; you get a lot more rib fractures; a lot more damage to the lungs and internal organs because of the side-impact.
Explanation:
.
All of them apply because they all are doing some thing to move
Answer:
B. A object in motion stays in motion, and an object at rest stays at rest unless acted upon by a net force.
