Science

PhysicsQ&A LibraryIn a downhill ski race surprisingly little advantage is gained by getting a running start. This is because the initial kinetic energy is small compared with the gain in gravitational potential energy even on small hills. To demonstrate this, find the final speed and the time taken for a skier who skies 80.0 m along a 25° slope neglecting friction for the following two cases. (Note that this time difference can be very significant in competitive events so it is still worthwhile to get a running start.)(a) starting from restfinal speed m/stime taken s(b) starting with an initial speed of 3.00 m/sfinal speed m/stime taken sQuestion

In a downhill ski race surprisingly little advantage is gained by getting a running start. This is because the initial kinetic energy is small compared with the gain in gravitational potential energy even on small hills. To demonstrate this, find the final speed and the time taken for a skier who skies 80.0 m along a 25° slope neglecting friction for the following two cases. (Note that this time difference can be very significant in competitive events so it is still worthwhile to get a running start.)(a) starting from rest

final speed

m/s

time taken

s

(b) starting with an initial speed of 3.00 m/s

final speed

m/s

time taken

s

Find answers to questions asked by students like you.

Q: Consider two displacements, one of magnitude 12 m and another of magnitude 16 m. What angle between ...

A: The expression for the angle,

Q: Which of the following statements describe a characteristic of the solar system that is explained by...

A: Kepler’s second law of planetory motion states that, when a planet moves around the sun, it’s veloci...

Q: a 7500-kg rocket blasts off vertically from the launch pad with a constant upward acceleration of 2....

A: Given,

Q: A baseball was hit with a speed of 30m/s at an angle of 45 degrees. It lands on the flat roof of a 1...

A: The velocity along the x and y axis are

Q: * 10. For each of the following velocity vectors, the x- and y-components of the vector are indicate...

A: Consider the point from which the vector begins to be the origin. Now, consider the components verti...

Q: Three displacement vectors are:A = 35.0 m @ 30.0o above the + x-axisB = 27.5 m @ 30.0o to the left o...

A: The Figure shows the displacement vectors A, B, and C and their respective angles with x and y axis ...

Q: A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If its mass is 3.50×...

A: case 1the deceleration is given by

Q: A sailboat sets out from the U.S. side of Lake Erie for a point on the Canadian side, 77.0 km due no...

A: Click to see the answer

Q: An electric dipole is formed from ± 5.0 nC point charges spaced 2.0 mm apart. The dipole is centered...

A: Given,