Friday Jan. 17 Warm Up

A car manufacturer claims that its latest model can

go from “0 to 90” in 7.5 seconds. If “90” refers to

90 km/h, calculate the car’s acceleration?

• 12 m/s²

• 12 km/h/s

• 187.5 km

• 187.5 m/s²

Mars’ gravitational force is less than that of Earth’s . If an astronaut drops a hammer and its speed increases from 0 to 15 m/s in 4.04 s, what is the acceleration due to gravity on Mars?

• 9.8 m/s²

• 0.269 m/s²

• 60.6 m/s²

• 3.71 m/s²

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Mark slams on the brakes after traveling 25 m/s. It takes him 3 seconds to come to a complete stop. What is his acceleration?

• 8.33 m/s²

• -8.33 m/s²

• 75 m/s²

• -75 m/s²

Tags

NGSS.HS-PS2-1

A bicyclist begins moving with a velocity of 10 m/s and then decreases his velocity to 6 m/s in 2 seconds. What is the acceleration of the bicyclist?

• 4 m/s²
• -4 m/s²
• 2 m/s²
• -2 m/s²

A car starts from rest at a stop light and reaches 20 m/s in 3.5 s. Determine the acceleration of the car.

• 2.2m/s²
• 7.0m/s²
• 5.7m/s²
• 70m/s²

Tags

NGSS.HS-PS2-1