The chart lists the masses of four balls that have the same momentum.

A 2-column table with 4 rows. The first column labeled Ball Color has entries Green, Red, Yellow, Purple. The second column labeled Mass (kilograms) has entries 0.5, 1.2, 0.9, 1.7.
Which correctly compares two of the balls?

The green ball has a lower velocity than the purple ball.
The red ball has a greater velocity than the purple ball.
The yellow ball has a higher velocity than the green ball.
The red ball has a greater velocity than the green ball.

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?

The two required components for a generator

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?