A bullet fired from a rifle travels at an average speed of 2520 km/hr. It hits the target after 0.2 seconds. How far (in meters) is the target from the rifle?

Question

08-10-2023
Physics

High School

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A bullet fired from a rifle travels at an average speed of 2520 km/hr. It hits the target after 0.2 seconds. How far (in meters) is the target from the rifle?

Answer :

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ConnorKelly321 ConnorKelly321 · Answer 1 · 2025-04-02T07:02:03-04:00

Final answer:

Given a bullet's average speed of 700m/s (converted from 2520 km/hr), and the time it takes to hit the target (0.2s), we calculate the distance by multiplying the speed by time to get 140m. Thus, the target is 140 meters away from the rifle.

Explanation:

The problem is asking how far the target is from the rifle given the bullet's speed and travel time. This problem involves the basic physics principle of distance, speed, and time. In this scenario, the bullet's average speed is 2520 km/hr which needs to be converted to m/s (meters per second) to match the unit of time given in seconds. We do this by multiplying 2520 km/hr by 1000 m/km and dividing the result by 3600 seconds/hr. We get approximately 700 m/s.

Once we have the speed in m/s, we simply multiply this by the travel time (0.2 seconds) to find the distance travelled. Therefore, distance = speed * time = 700 m/s * 0.2 s = 140 m. So, the target is 140 meters away from the rifle.

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