- #1
Physicsrapper
- 24
- 0
Hi, I have some questions regarding Kinematics:
1. If an object is accelerating at 9.8 m/s^2, how much time does it Need to reach ten percent of the Speed of light?
Speed of light: 299 792 458 m / s -> 10% -> 299 792 45,8 m / s
t = v/a -> 299 792 45,8 m / s / 9.8 m/s^2 = 3 059 106.714 s = 849.8 h
2. An object is uniformly accelerated at a = 4m/s^2. At time t, the object has a velocity v = 50 m/s. What is its velocity before and afterwards?
t = v/a = 50m/s / 4m/s^2 = 12.5 s
7.5s * 4m/s^2 = 30 m/s
17.5 s * 4m/s^2 = 70 m/s
3. The fastest dragster reaches 632 km/h in 3.72s. Find its average acceleration.
a=v/t -> 175.6m/s / 3.72s = 47.2m/s^2
Are all my Solutions true?
1. If an object is accelerating at 9.8 m/s^2, how much time does it Need to reach ten percent of the Speed of light?
Speed of light: 299 792 458 m / s -> 10% -> 299 792 45,8 m / s
t = v/a -> 299 792 45,8 m / s / 9.8 m/s^2 = 3 059 106.714 s = 849.8 h
2. An object is uniformly accelerated at a = 4m/s^2. At time t, the object has a velocity v = 50 m/s. What is its velocity before and afterwards?
t = v/a = 50m/s / 4m/s^2 = 12.5 s
7.5s * 4m/s^2 = 30 m/s
17.5 s * 4m/s^2 = 70 m/s
3. The fastest dragster reaches 632 km/h in 3.72s. Find its average acceleration.
a=v/t -> 175.6m/s / 3.72s = 47.2m/s^2
Are all my Solutions true?