Ann is driving down a street at 58 km/h. Suddenly a child runs into the street. If it takes Ann 0.742 s to react and apply the brakes, how far will she have moved before she begins to slow down? Answer in units of m.
sorry - I misread your other post. The answer here is much simpler.
58 km/hr = 16.11 m/s
distance = speed * time = 16.11 m/s * 0.742s = 11.95m
To find the distance Ann will have moved before she begins to slow down, we need to calculate the distance she travels during her reaction time at a speed of 58 km/h.
First, let's convert the speed from km/h to m/s.
1 km/h = 1000 m / 3600 s = 0.2778 m/s
So, Ann's speed is 58 km/h * 0.2778 m/s = 16.12 m/s.
Now, we can calculate the distance Ann travels during her reaction time.
Distance = Speed * Time
Distance = 16.12 m/s * 0.742 s
Distance ≈ 11.95 m
Therefore, Ann will have moved approximately 11.95 meters before she begins to slow down.
To find how far Ann will have moved before she begins to slow down, we need to use the equation for distance traveled with uniform motion given by:
distance = speed * time
First, let's convert Ann's speed from km/h to m/s by applying the conversion factor of 1 km/h = 0.2778 m/s.
Ann's speed is 58 km/h, so her speed in m/s would be:
58 km/h * 0.2778 m/s = 16.09 m/s
Now, we need to calculate how far Ann will have traveled during her reaction time of 0.742 seconds.
Using the equation distance = speed * time, we have:
distance = 16.09 m/s * 0.742 s
Calculating this, we get:
distance = 11.93 m
Therefore, Ann will have moved approximately 11.93 meters before she begins to slow down.