Author Question: At target practice, a rifle bullet is fired at an angle of 30 below the horizontal with an initial ... (Read 86 times)

sdfghj

  • Hero Member
  • *****
  • Posts: 552
At target practice, a rifle bullet is fired at an angle of 30 below the horizontal with an initial velocity of 800 m/s from the top of a cliff 80 m high.
 
  How far from the base of the cliff does it strike the level ground below if air resistance is negligible?

Question 2

The position of an air-track cart that is oscillating on a spring is given by the equation x = (12.4 cm) cos(6.35 s-1)t. At what value of t after t = 0.00 s is the cart first located at x = 8.47 cm?
 
  A) 7.39 s B) 7.75 s C) 4.34 s D) 0.108 s E) 0.129 s



rleezy04

  • Sr. Member
  • ****
  • Posts: 322
Answer to Question 1

140 m

Answer to Question 2

E



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

For a complete list of videos, visit our video library