Answer :
Final answer:
To estimate the force exerted by the seat belt during a car impact, one needs the time over which the impact occurs, in addition to the mass of the dummy and its initial velocity. Without the impact duration time, we cannot calculate the exact force.
Explanation:
The question relates to the physics concept known as impulse and momentum. To estimate the force that the seat belt exerts on a crash-test dummy during an impact, one can use the formula Δp = F Δt, where Δp is the change in momentum, F is the force exerted, and Δt is the time over which the force is applied.
In this scenario, the car and the dummy come to a stop upon impact, so the change in momentum (Δp) will be equal to the initial momentum since the final momentum is zero. With the given information, you would calculate this using the dummy's mass (85 kg) and the initial velocity (30 m/s).
However, the time Δt over which the impact occurs is needed to answer the question, which appears to be missing from the original query. Without this time value, we cannot calculate an exact force.
Complete Question:
A car equipped with an 80−kg crash-test dummy drives into a wall at 26 m/s. Find the force that the seat belt exerts on the dummy upon impact if the collision time is 0.8 second. (2-pnts)
