Match the terms to their definition. 1. acceleration
2. force
3. magnitude
4. scalar
5. velocity
A. a change of velocity; the measure of how quickly velocity is changing
B. a push or a pull
C. a quantity that has magnitude only
D. size
E. speed in a given direction
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Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

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?

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)