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1. Suppose you roll a ball off a tabletop. Will the time to hit the floor depend on the speed of the ball? ( Will a fast ball take a longer time to hit the floor?) Defend your answer.
2. Fragments of fireworks beautifully illuminate the night sky. ( a) What specific path is ideally traced by each fragment? ( b) What paths would the fragments trace in a gravity- free region?
3. The hang time of a basketball player who jumps a vertical distance of 2 feet ( 0.6 m) is about What will be the hang time if the player reaches the same height while jumping 4 feet ( 1.2 m) horizontally?
4. Why are satellites normally sent into orbit by firing them in an easterly direction, the direction in which Earth spins?
5. Which requires less fuel, launching a rocket to escape speed from the Moon or from Earth? Defend your answer.
A rifle with a weight of 20 Newton fires a 3.5 gram bullet with a speed of 260 meter per second. Evaluate what the recoil speed of the rifle
A car starts from rest at a stop sign. It accelerates at 4.6m/s^2 for 7.0s , coasts for 2.3s , How far apart are the two stop signs
A charge of -3.80 nC and a charge of -6.00 nC are separated by a distance of 60.0 cm. Find out the position at which a third charge of +7.30 nC could be placed so that the net electrostatic force on it is zero.
A car drives straight off the edge of the cliff that is 56 m high. The police at the scene of the accident note that the point of impact is 128m from the base of the cliff. How fast was car travelling when it went over the cliff.
two resistors are wired in series. the second resistor has twice the resistance as the first. current passes through
A projectile fired from a gun has initial horizontal and vertical components of velocity equal to 30 m/s and 40 m/s, respectively. What is the speed of the projectile when it is at the highest point in its trajectory_________. What is the accelerati..
A person looks horizontally at the edge of a swimming pool. If its length is 5.00m, and the pool is filled to the surface, to what depth (in m) could observer see? For water is 1.33).
A container is filled to the brim with 1.6 L of mercury at 20°C. Determine the linear expansion coefficient of the material
a string of linear density 1.5 gm is under a tension of 20 n. what should its length be if its fundamental resonance
a solid ball has a rotational inertia of 0.0314 kgm2. it is rotated by applying a 4.7 N force tangentiallyto it. the radius is 14 cm. what is the angular acceleration of the ball
an airplane pilot wishes to fly directly westward. according to the weather bureau a wind of 75.0 kmh is blowing
a particle charge 2.0mc that moves where only electric forces act on it has a kinetic energy of 5.0 j at point a. the
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