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Indicate whether the following statements are always true or can be false.
1. If a net force acts on an object, the object's speed will change.
2. If a net force acts on an object, the object's velocity will change.
3. The net force which acts on an object which remains at rest is zero.
4. Two objects are under the influence of equal forces, they have the same acceleration.
5. A motorcycle initially moving at a constant velocity will slow down unless a small net force is applied.
6. Through the collision of a car with a large truck, the car exerts a lesser force on the truck than the truck exerts on the car.
two wires on a piano are the same length and are stretched to the same tension. wire 1 vibrates at a frequency 1.5
One fine spring afternoon, you go outside to play a rousing game of hoop-and-stick. If your hoop rolls without slipping, what is the angular speed of the hoop
Using Newton's law of attraction between two bodies, derive a formula for the gravity field as a function of distance x from the point over the center of mass of a spherical body at depth, d and of density, ρ.?
Four objects are situated along the x axis as follows: a 1.70kg object is at -0.9m, a 1.60kg object is at 0.2m, a 2.4-kg object is at the origin, and a 2.50kg object is at -1.10m.
An ocean liner leaves New York City and travels 43° north of east for 189 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the directions.
Two equal masses, one initially at rest and the other traveling to the right at a speed of 3.6 m/s, elastically collide. Determine the final speed of both masses
Two students on roller skates stand face-to-face, then push each other away. One student has a mass of 99 kg and the second student 68 kg. Find the ratio of the magnitude of the first student's velocity to the magnitude of the second student's veloci..
A steel rod is 3.000 cm in diameter at 25° C. A brass ring has an interior diameter of 2.992 cm at 25° C. At what common temperature will the ring now slide onto the rod?
Robert has just bought a new model rocket, and is trying to measure its flight characteristics. how much work is done by the drag force on the rocket during its ascent
Unpolarized passes through two polarizers that are oriented 65 degrees to each other. What is the orientation of the polarizers
a crane on a dock lifts an 1107kg container 28m, swings it out over the deck of a freighter, and lowers the container into the hold of the freighter, how much work is done by the crane on the container
A rock is suspended from the string and moves downward at constant speed. Which statement is true concerning the tension in the string if air resistance is ignored.
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