Mechanics | Relativity Answers

What will be the resultant speed of a boat whose heading is 60 degrees with respect to the current and whose speed is 15 km/hr with respect to the water if the current has a speed of 2.0 km/hr and the wind is blowing in a direction of 20 degrees to the current with a speed of 5.0 km/hr?

What is the resultant speed of an airplane headed due south at a speed of 500 km/hr while being subjected to a 100 km/hr wind coming from the northeast?

A worker bee flies 504m south from a rose garden to the hive; she gets the message that there are many more flowers 993m southeast. How far is it from the first flower field to the second?

A 45.0 kg ice skater stands at rest on the ice. A friend tosses the skater a 5.0 kg ball. The skater and the ball then move backwards across the ice with a speed of .50 m/s. what was the speed of the ball at the moment just before the skater caught it?

On the ground Albert and Isaac inspect the new spaceship their university has purchased. They find it nice and spacious measuring 25 m in length. Later in the day Isaac takes off in the new spaceship to explore the galaxy. After the spaceship has reached cruisespeed, Albert find that its length has contracted to 10 m. What is the speed of the spaceship?

Find an expression for the energy density in terms of stress and strain

The third floor of a house is 8m above street level. How much work is needed to move a 150kg refrigerator to the third floor?

Deduce an expression for height of a liquid in capillary tube. Also write practical applications of capillary
action.

Two geological field teams are working in a remote area. A global positioning system (GPS) tracker at their base camp shows the location of the first team as 44 km away, 16° north of west, and the second team as 34 km away, 33° east of north. When the first team uses its GPS to check the position of the second team, what does it give for the second team's (a) distance from them and (b) direction, measured from due east?

what is the value of teta and cos teta whe the force and the displacement is perpendicular to each pther?