When a simple magnifying glass is used properly, the image will be formed
a. at the focal point of the lens.
b. just inside the focal length of the lens.
c. about 500 millimeters behind the lens.
d. about 250 millimeters in front of the lens.

Why does the input force have to be greater than the force needed to lift the bale?

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to. in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)