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- . The Kingda Ka roller coaster in New Jersey is the world’s tallest ride of its kind. As the passenger cars are launched from rest at the start, they are accelerated uniformly to a speed of 57 m/s (128 mph) in just 3.5 s. (a) What is the acceleration experienced by passengers on this ride in m/s2? In g’s? (b) If a certain passenger has a mass of 65 kg, what is the force in newtons that acts on him during the launch phase of this ride? What is the force in pounds?(a) A cat with a mass of 850 kg in moving to the right with a constant speed of 1.44 m/s. What is the total force on the cat ? (b) What is the total force on the cat if it is moving to the left?A soft tennis ball is dropped onto a hard floor from a height of 1.50 m and rebounds to a height of 1.10 m. (a) Calculate its velocity just before it strikes the floor. (b) Calculate its velocity just after it leaves the floor on its way back up. (c) Calculate its acceleration during contact with the floor if that contact lasts (3.50103s). (d) How much did the ball compress during its collision with the floor, assuming the floor is absolutely rigid?
- . As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. (a) What is the baseball’s acceleration in m/s and in Ws? (b) What is the size of the force acting on it?5. A 16,000 lb airplane starts from rest and has a uniform acceleration of 4 ft/s*. If it requires a speed of 90 ft/s to take off, find: a. the minimum run for the take-off. b. the minimum time from rest to take-off. c. the net engine thrust available for the said acceleration.What can we say about the motion of a freely falling body? A. It is uniformly accelerated. B. It is uniform. C. It will always reach terminal velocity. D. Its acceleration results from gravity and air resistance.
- 5. Two mass A and B are at rest initially at the given positions. 0.4 m A t. 0,8 m B 0.9 m 1.1 m If B starts to move to the right with an acceleration of 2 m/s2 , what would be the position of A after 8 sec.?1.What is the measure of an object's inertia? A. acceleration C. net force B. interaction D. mass 2.What relationship exists between mass and acceleration? A. direct C. inverse B. direct square D. inverse square 3.Which statement is FALSE when a bus is overloaded? A. Its mass is increased. C. Its acceleration increases. B. Its inertia is increased. D. It requires greater force to keepA satellite is traveling through distant space with a speed of 19,000 km/hr. What will happen to the speed of the satellite over time? A. The satellite will have a positive acceleration there is no friction. B. The satellite will have a negative acceleration because of friction. C. The satellite will have a positive acceleration because of friction. D. The satellite will maintain a constant speed because there is no friction.
- 14. If a car has a positive velocity and a positive acceleration, then it is:A. slowing down C. moving at constant velocityB. speeding up D. has zero velocity15. It is a property of an object to resist any change in its present motion.A. Inertia C. AccelerationB. Position D. Density16. If two objects, with masses m1 and m2 are acted by the same net force, which will have agreater acceleration?A. The one with a lesser massB. The one with a greater massC. They will always have the same acceleration regardless of their massesD. None of the above1. What causes an object to accelerate? a. Inertia b. net force acceleration d. mass 2. What will be the acceleration of an object with lower inertia? a. An object will have a lower acceleration because a lower inertia means a greater mass. b. An object will have a greater acceleration because a lower inertia means a lower mass. c. An object's mass has nothing to do with the object's acceleration. d. An object's mass is not a measure of the object's inertia . 3. John was riding a skateboard and hit a curb in the front wheels. His skateboard stopped and he was thrown forward. Which of the following best describes the scenario? a. A net force (which comes from the curb) acts both to John and the skateboard. b. A net force (which comes from the curb) only acts to John that is why he was thrown forward. c. A net force (which comes fiom the curb) only stops the skateboard and not John that is why he wa thrown away. d. A net force is not relative to John and the skateboard. 4.The…QUESTION 3 When the acceleration of a moving body is zero, a. The body is moving with a constant velocity. b. The body must have zero mass. C. The body must be at rest. O d. The body must be moving in a circular path. e. The body must be speeding up.