Question

It was once recorded that a jaguar left skid marks that were 350m in length. Assuming that the jaguar had a constant acceleration of -4.5m/s/s, determine the speed of the jaguar before it began to skid.

A.56.125
B.47.6
C.57.125
D.3150.0

Answer 1

Using the kinematic equation, the initial speed of the jaguar was calculated to be 56.125 m/s before it started skidding, which is option A.

Step-by-step explanation:

To determine the speed of the jaguar before it began to skid, we can use the following kinematic equation that relates initial velocity, acceleration, and distance covered:

v2 = u2 + 2as

Where:
v is the final velocity (0 m/s in this case, since the jaguar comes to a stop),
u is the initial velocity (the speed we are looking for),
a is the acceleration (-4.5 m/s2),
and s is the distance (350 m).

Rearranging the formula to solve for initial velocity u gives:

u = √(v2 - 2as)

Plugging in the values:

u = √(02 - 2 × (-4.5 m/s2) × 350 m)

u = √(0 + 3150)

u = √3150

u = 56.125 m/s

Therefore, the speed of the jaguar before it began to skid was 56.125 m/s, which corresponds to option A.