Recent content by BlueOwl

Homework Statement When someone ties a string to a ball and swings it in a circular motion is the string doing work on the ball? Homework Equations The Attempt at a Solution Ok I am a little bit lost here it does seem that the tension on the string is doing work on the ball but...

where does the 250 miles per hour come into the formula though? or it doesn't ?

Homework Statement The take-off speed of a given airplane is 250 mi/h. If the take-off weight is 110,000 Kg, what is average the thrust force exerted by the engines? Homework Equations w=mg ,F=ma , F=mW The Attempt at a Solution the mi/h confuses me and I don't know which...

Im still Confused . I know that the the elevator is accelerating downwards, reducing his apparent weight but how do I solve for the Magnitude?

Homework Statement A person that has a weight, on land, of 145 lb gets on an elevator to records an apparent weight of 122 lbs. What is the direction and magnitude of the elevator's acceleration? Homework Equations F=ma or F=mW The Attempt at a Solution I have no Clue how to...

Is Newton's first law included in the second law?

Homework Statement The acceleration of a particle is 5 m/s^2. What is the acceleration in Km/hr^2 and ft/hr^2? Homework Equations 1km=1000m , 1m = 3.28 ft , 1hr=3600s The Attempt at a Solution ok so i have answers with calculator which is 5m/s^2 = 64800 km/hr^2 and...

Homework Statement A car starts from a point and returns to the same point after 160 seconds. During this time the car traveled at an average speed of 10 m/s. What is its displacement? What is its average velocity? Explain your answers using a motion graph (Position - time) Homework...