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Q1. A plane is flying horizontally with speed 198 m/s at a height 6640 m above the ground, when a package is dropped from the plane.
The acceleration of gravity is 9.8 m/s2.
Neglecting air resistance, while the package hits the ground, the plane will be
1. Directly above the package.
2. behind the package.
3. ahead of the package.
Q2. A roller coaster (335 kg) moves from A (5.00 m above the ground) to B (28.0 m above the ground). Two non conservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long climb. What is the transform in the car's kinetic energy, ΔKE = KEf - KE0, from A to B.
Both car A and car B leave school at the same time, traveling in the same direction. Car A travels at a constant speed of 71 km/h while car B travels at a constant speed of 90 km/h. how faris car A from school 2.2 h later.
A Hydrogen atom has one proton in the nucleus and one electron in the shell. In a classic model of the atom, What is the radius of the orbit
A projectile is shot from the edge of a cliff h = 105 m above ground level with an initial speed of v0 = 135 m/s at an angle of 37.0Â ° with the horizontal.
Two particles, with charges of q1 = 60.0nC and q2 = ?60.0nC, are placed at the points with coordinates, Find the electric potential energy of the configuration of the three fixed charges
A 3.00 kg steel ball strikes a massive wall at 10.0 m/s at an angle of ? = 60.00 with the plane of the wall. what is the average force exerted by the wall on the ball
A 240 , 50.0-cm-diameter turntable rotates on frictionless bearings at 57 . A 22 block sits at the center of the turntable. A compressed spring shoots the block radically outward along a frictionless groove in surface of the turntable. What is turn..
Find the gravitational pull between earth and the moon. Given, mass of earth = 5.97 * 10^24 kg, mass of moon = 7.35 8 10 kg,
in a 10ft^2 room wiyh no window and no doors . The air in the room is 79% N(sub2) and 21% O(sub2). What is the weight of the air
Consider an experiment where a subject lands during two conditions from a height of 0.2 m. During the first landing condition, the subject lands 'stiffly' (e.g., very little knee flexion).
The work function for copper is 4.70 eV. Find the cutoff wavelength for copper
The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and approximate the human body by a rectangular block with a height of 1.58 m, Calculate the power emitted by the human body
A 13000 kg railroad car travels alone on a level frictionless track with a constant speed of 17 m/s. A 6500 kg load, originally at rest, is dropped onto the car. What will be the car's new speed.
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