Author Question: A student uses a plumb bob to verify that the doorjamb in a car is vertical. As the car pulls away ... (Read 85 times)

Themember4 · **on:** Jul 29, 2018

A student uses a plumb bob to verify that the doorjamb in a car is vertical. As the car pulls away from a stop, the student observes that the string now makes an angle with the doorjamb. What is the acceleration of the car?

A) g sin
B) g cos
C) g tan
D) g
E)

Question 2

Air is flowing through a rocket nozzle. Inside the rocket the air has a density of 5.25 kg/m3 and a speed of 1.20 m/s. The interior diameter of the rocket is 15.0 cm. At the nozzle exit, the diameter is 2.50 cm and the density is 1.29 kg/m3.

What is the speed of the air when it leaves the nozzle? A) 176 m/s
B) 29.3 m/s
C) 88.0 m/s
D) 35.2 m/s
E) 343 m/s