Question

level 1 q1 the international space station (iss) orbits the earth at about 27,578 kilometres (17,150 miles) every hour. this is an example of a. orbital speed b. velocity c. acceleration d. none of the above level 1 q2 what is the speed of an eagle that travels 200 meters in 4 seconds? a. 800 m/s² b. 800 m/s c. 50 m/s² d. 50 m/s level 1 q3 what is the average speed of someone who walks 3 kilometres in 1 hour? a. 3 m/h b. 0.33 km/h c. 3 km/h d. 0.33 km/h² level 1 q4 a meteor changed speed from 1.8 km/s to 1 km/s in 0.03 seconds. what was the acceleration of the meteor? a. 26.7 km/s² b. -26.7 km/s² c. -33.3 km/s² d. 60 km/s²

Explanation:

Q1

Orbital speed is the speed at which an object orbits around another object (in this case, the ISS orbiting the Earth). Velocity is speed with direction. Acceleration is the rate of change of velocity. Since the question is about the speed of orbiting, it's orbital speed.

Answer:

A. Orbital speed

Q2

Step1: Recall the speed formula

Speed \(v=\frac{d}{t}\), where \(d = 200\) meters and \(t=4\) seconds.

Step2: Calculate the speed

\(v=\frac{200}{4}=50\) m/s. Note that the units of acceleration (\(m/s^{2}\)) are wrong in options A and C.