Mechanics | Relativity Answers

two vectors each have magnitudes of 18 and 5. what is the minimum and maximum value the resultant of these two vectors can have?

005 (part 1 of 2) 10.0 points
An artillery shell is fired at an angle of 69.8
◦
above the horizontal ground with an initial
speed of 1930 m/s.
The acceleration of gravity is 9.8 m/s
2
.
Find the total time of flight of the shell,
neglecting air resistance.
Answer in units of min
006 (part 2 of 2) 10.0 points
Find its horizontal range, neglecting air resistance.
Answer in units of km
007 10.0 points
A stone is thrown from ground level at 77 m/s.
Its speed when it reaches its highest point is
52 m/s.
Find the angle, above the horizontal, of the
stone’s initial velocity.
Answer in units of ◦

Why an observer can always detect a lower pitch sound when a sound source is moving away from him/her?

When a polar bear on an iceberg notices that his 1870 N weight is just sufficient to sink the iceberg-?
WHAT IS THE WEIGHT OF THE ICEBERG?
It's a question for my Physics exam tomorrow... Help

a speedy racer is drivint his car on a linear racing strip try to test out his cars specifications.he starts running the diagnostics while his car is travelling at a rate of 5 m/s. over the course of the next 5.4 seconds, he quadruples his speed and crosses the finish line. how far away was the finish line from where he started his diagnostic?

A soccer player kicks the baLL towards a goal that is 6.8 meters in front of him. The ball leaves his foot at 6 meters per second and an angle of 28 degrees above ground. Find the speed of the ball when the goalie catches it in front of the net.

How much time does it take for the particle to accelerate from 68.2 m/s to 109.4 m/s?

An astronaut plays paddle ball in orbit. The ball is hit with a speed of 5.21 m/s in the positive direction and has an average negative acceleration of 4.5 m/s^2. How far does the ball travel before it stops and begins to return toward the paddle? How long is it moving in the positive direction?

Moving man starts in the negative direction with a speed of 3 m/s but is accelerating in the positive direction with acceleration of 2.75m/s^2. What is his velocity and displacement at the end of 5.00 seconds?

An airplane flies north at a speed of 150 km/h relative to the air through which it flies. If there is a tail wind of 50 km/h, what is the plane's velocity relative to the ground?