Recent content by elpermic

Homework Statement its for me midterm.. a person applies a constant force on an object of mass 20 kg that causes the object to move horizontally at a constant speed of 0.20 m/s through a distance of 0.80m . What is the work done on the object? A) 0J B) 10J c)16J d)160jNow the answer is 0J...

Nevermind! I think I figured it out.

A glider on an air track moves in the +X direction with a constant acceleration.? It has two flags, each exact? A glider on an air track moves in the +X direction with a constant acceleration.? It has two flags, each exactly 25.4 mm long, with the midpoints of the flags separated by 162 mm...

Homework Statement the ends of a rope are fastened to two hooks on a horizontal ceiling. A 100 N crate is attached to the rope so that the two segments of the rope make angles of 35 and 55 degrees with the horizontal. Determine the tension in each segment Homework Equations F=ma...

i don't get the concept at how to do this when the question asks me "to catch the object before it hits the ground"

don't get this 2d motion problem?? Homework Statement a player kicks a football at an angle of 40.0 degrees above the horizontal with an initial speed of 14.0 m/s. Air resistance may be ignored. A second player standing at a distance of 26.0m from the first(in the direction of the kick)...

63 is the top of the launch platform

Homework Statement A rocket carrying a satellite is accelerating straight up from the Earth's surface. At 1.35 s after liftoff, the rocket clears the top of its launch platform. After an additional 4.45s it is 1.00km above the ground. Calculate the magnitude of the average velocity of the...

well the average mass per unit area we had from this lab was 0.285824 g/cm^2. so if i multiplied the average x area i would get the mass?

Homework Statement i'm suppose to find the mass of a mysterious object(a tile)i i know the area, which is centimeters squared, and asked to find the mass. would i just multiple g/cm^2 and my area together to get the mass? Homework Equations The Attempt at a Solution

Nevermind, I solved it.

The magnitude of vector a is 5.38, vector b 3.16. I calculated the angle between the two to be 40.2 degrees. So I took ABsin(40.2) and got my answer is 11.0. The answer in the back says -17.0k, 17.0. I'm confused.. Is the book wrong or me?

The answer says -17.0k and 17.0. So shouldn't this mean it's a 3D problem? My teacher never taught me this in class and gave us 2 vector problems like this.

2D or 3D vector problem?? Homework Statement Find the vector product of Vector A cross Vector B(expressed in unit vectors) of the two vectors. What is the magnitude of the vector product? Homework Equations Vector A= 5.00i + 2.00j Vector B= 3.00i - 1.00j The Attempt at a...

Homework Statement Find the scalar product of the 2 vectors. Vector A is north of east at 70 degrees with a magnitude of 3.60m Vector B is south of west at 30 degrees with a magnitude of 2.40mHomework Equations ABcosxThe Attempt at a Solution I did dot product using the formula...