1.If the rock were thrown from a cliff of height H' = 2H, the rock would land at a distance D' from the base of the cliff. Compare D and D'. D' = sqrt(2)D D' = 2D D' = 4D 2...

1.If the rock were thrown from a cliff of height H' = 2H, the rock would land at a distance D' from the base of the cliff. Compare D and D'. D' = sqrt(2)D D' = 2D D' = 4D 2...

Suppose you are deep sea diving and you start to wonder if the speed of sound in water is different at these depths. You sing a perfect tone of 360 Hz into a tube, and through some measurements determine...

On a very wet and slippery rugby field a 120 kg halfback tackles a 90 kg second rower. Prior to the collision the halfback is slipping with a velocity of 5.6m/s south and the second rower is sliding...

A car of 1 tonne travels at a speed of 100km/h collides with a 3 tonne van travelling 20km/h in the same direction. After the collision the car rebounds at 20km/h. Calculate the impulse on the van...

A small car of mass 500kg is travelling at 120km/h when it hits stationary truck (of 1.5 tonne mass) head on. The small car rebounds and travels in the opposite direction at 40km/h. The collision...

A rocket is standing by to launch. While sitting on the launching pad the rocket has zero velocity and thus zero initial momentum (p1=0). When the rocket takes off, a bystander proclaims that the...

When there is free fall there is work done then how the energy "mgh" remain constant all over the way.

A car (m=900kg) travelling at 70km/h hits a pedestrian (m=60kg) who is travelling at 1m/s in the same direction. After the collision the car has a velocity of 30km/h in the same direction it was originally...

A potential energy function can be specified for a dissipative interaction.

Rod with length L has net charge -Q distributed along its length. The rod is placed with one end at the origin and the other at point (0,L) on the y-axis. Find the components of the electric field...

A 1.00 g sample of samarium emits alpha particles at a rate of 120 particles/s. The responsible isotope is 147 Sm, whose natural abundance in bulk samarium is 15%. Calculate the half life...

A 1500 kg car starts from rest, and rolls down a frictionless 5.09˚ slope that is 17.5 m long. How much time does it take to reach the bottom? Unit=s This is an example from my book,...

The meter was once defined as 1 650 763.73 wavelengths of the orange light emitted by a source containing krypton-86 atoms. What is the photon energy of that light?

This is everything that is provided in the question aside from a few word changes due to the academic honesty policy and the character limit. To clarify the problem, you are 75m high because you are...

A is 3.00m Use the component method to add the vectors vector A and vector B shown in the figure. The length of vector B is 3.50 m and the angle θ = 24.0°. Express the resultant vector...

A baseball is released at rest from the top of the Washington Monument. It hits the ground after falling for 6.0 s. What was the height from which the ball was dropped? (g=9.8 m/s^2 and assume air...

A rock, released at rest from the top of the tower, hits the ground after 1.5 s. What is the speed of the rock as it hits the ground? (g=9.8 m/s^2 and air resistance is negligible). Solve this problem...

Omar throws a rock down with speed 12 m/s from the top of the tower. The rock hits the ground after 2.0 s. What is the height of the tower? (Air resistance is negligible) Solve this problem using...

A train starts from rest and accelerates uniformly, until it has traveled 2.1 km and acquired a velocity of 24 m/s. The train then moves at a constant velocity of 24 m/s for 400 s. The train then...

Gwen releases a rock at rest from the top of a 40m tower. If g=9.8 m/s^2 and air resistance is negligible, what is the speed of the rock as it hits the ground? Solve this problem using numbers and...

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