26. A cart is uniformly accelerating from rest. The net force acting on the cart isa. decreasingb. zeroc. constantd. increasing27. Assume that an object has no unbalanced force acting on it. Which statement about the object istrue?a. The object may be in motionb. The object must be slowing downc. The object must be at restd. The object may be speeding up28. If the mass of an object were doubled, it's acceleration due to gravity would bea. halvedc. unchangedd. quadrupledb. doubled29. For a freely falling object, the ratio of the force of gravity to its acceleration isa. weightb. momentumc. Kinetic energyd. mass

Given data: Cart's acceleration uniform Initial velocity = 0, starting from rest

Answered: 26. A cart is uniformly accelerating…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A rock is dropped from 20 feet above the surface of the Earth. Which of the following is true? a. It falls because of the combined effects of gravity and air pushing downward upone it. b. It falls because of a natural tendency for rocks to rest upon the Earth c. It speeds up as it falls because of a nearly constant force of gravity acting on it. d. It speeds up as it falls because of an increasing force of gravity acting upon it. e. It quickly reaches a maximum speed, then falls at a constant rate.
9. The car is moving at a constant speed as shown. Which of the following statements is correct? A. The acceleration of the car must be zero. B. The net force acting on the car must be zero. C. Friction and drag force must have the same magnitude and opposite direction. D. All of the above. Farag = 10 m/s Ffriction
Give the weight of the following objects: a. An object with a mass of 5kg b. An object with a mass of 15kg c. An object with a mass of 15kg on the moon, where g=1.6
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A heavy ball is thrown straight upward. After the ball leaves the thrower's hand, what forces act on the ball? a. A constant downward force from gravity, along with a steadily decreasing upward force from the thrower. b. A steadily decreasing upward force from the thrower on the way up, then a nearly constant force from gravity on the way down. c. A downward force of gravity that decreases substantially as the ball gains height, then increases substantially as the ball falls back downward. d. A steadily decreasing upward force from the thrower on the way up, then a steadily increasing force from gravity on the way down. e. A nearly constant downward force of gravity.
1. Which one of the following objects has the greatest inertia? a. ping pong ball b. a basketball c. a golf ball d. a bowling ball 2. The amount of matter in an object is called its ______. a. inertia b. balance. c. force d. mass no need for solutions. answer only
24. A pickup truck with mass 980 kg is initially at rest. The truck accelerates to a speed of 95 km/hr within a distance of 60 meters. What the direction and size of the force that acts on the truck? a. b. If the truck were carrying a load of 200 kg, what new force would be required to achieve the same acceleration?
2. Two masses are connected by a string, and suspended over a pulley. If one mass is 4.5 kg, and the other mass is 7.5 kg, what is the magnitude of the acceleration of the system? a. 6.1 m/s? b. 2.5 m/s² c. 3.7 m/s² d. 4.8 m/s? e. none of above
a. An object that is free-falling is acted upon by the force of gravity alone. b. A falling skydiver which has reached terminal velocity is considered to be in a state offree fall. c. A ball is thrown upwards and is rising towards its peak. As it rises upwards, it is NOT considered to be in a state offree fall d. An object in free fall experiences an acceleration which is independent of the mass of the object. e. A ball is thrown upwards, rises to its peak and eventually falls back to the original height. As the ball rises, its acceleration is upwards; as it falls, its acceleration is downwards. f. A ball is thrown upwards, rises to its peak and eventually falls back to the original height. The speed at which it is launched equals the speed at which it lands. (Assume negligible air resistance.) g. A very massive object will free fall at the same rate of acceleration as a less massive object.
A cart of mass 0.85 kg is on a track, connected by a string over a pulley to a hanging mass of 0.1 kg. A friction pad is attached to the bottom of the cart, and you push the cart so that it first moves toward the sensor, then away from the motion sensor. The net acceleration of the cart does which of the following? a. always points away feom the motion sensor b. always points toward the motion sensor c. the direction of the net acceleration cannot be determined
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