The car moves _ m in the first 4 seconds. 2 A car moves with a constant velocity of 7 m/s toward the east, for 5 seconds. 50 In the previous question, the car's average velocity is _ miles per hour toward the east? 30 A car speeds up from 4 m/s to 20 m/s in 8 seconds.

The car's average speed is _ miles per hour. To get there you travel along a 500 mile winding road and the trip takes 10 hours. A city is 300 miles straight east of your home. Which of the following is true? The object is accelerating, has a net force acting on it, and is not in equilibrium. An object is in circular motion but at constant speed. an object's resistance to change in its state of motion Which of the following is true of an object in mechanical equilibrium? The object can be moving but must not be accelerating and must have 0 net force acting on it. kilogram / newton According to our lecture notes (Lecture 2) the measure of an object's inertia is the object's _. The Metric unit of mass is a _ and the Metric unit of force is a _. newton If g (acceleration of gravity) is approximately 10 m/s/s, and I have a 70 kg object, what is the mass of that object? (number only, no units, example: 140, 35, 350, but not necessarily one of these numbers) 70 What is the weight of the 70 kg object in the previous question? 700 What is the inertia of the 70 kg object in the previous two questions? 70 What happens to the force of gravity on an object, when the object is placed in a vacuum (not out in space, but on the Earth's surface)? The force of gravity is unchanged.

static The metric unit of force is called a _. Which of the following is true about the mass and weight of an astronaut on the Earth's surface, compared to the Moon?ĭ.) both mass and weight are the same A.Equilibrium in which an object is at rest (not moving, velocity = 0) is called _ equilibrium. You can imply from this that bus'sĪ.) speed remained the same but its turning to the leftī.) speed remained the same but its turning to the rightĭ.) velocity decreased C.) velocity increased Action-reaction forces areĪ.) equal in magnitude but point in opposite directionsī.) equal in magnitude and point in the same directionĬ.) unequal in magnitude but point in the same directionĭ.) unequal in magnitude and point in the opposite directions A.) equal in magnitude but point in opposite directions When a football in a field goal attempt reaches its maximum height, how does its speed compare to its initial speed?ĭ.) it is equal to its initial speed B.) it is less than its initial speed The sum (resultant) of two vectors is the greatest when the angle between them isĭ.) 0 D.) 0 The acceleration due to gravity is greater on the Earth than on the Moon. When the rocket engines on the starship NO-PAIN-NO-GAIN are suddenly turned off, while traveling in empty space, the starship willĭ.) go faster and faster C.) move with constant speed Which of the following is an accurate statement?Ī.) a vector cannot have zero magnitude if one of its component is not zeroī.) the magnitude of a vector can be positive or negativeĬ.) if the magnitude of vector A is less than the magnitude of vector B, then the x component of A is less than the x component of Bĭ.) the magnitude of a vector can be less than the magnitude of one of its components A.) a vector cannot have zero magnitude if one of its component is not zero If you run a complete loop around an outdoor track (400m), in 100s, returning to your start point, then your average velocity isĭ.) 4.0 m/s A.) zero Can an object's velocity change direction when its acceleration is constant?Ī.) no this is not possible because it is always speeding up or always slowing down but it can never turn aroundī.) yes this is possible and a car that starts from rest, speeds up, slows to a stop, and then backs up is an exampleĬ.) no this is not possible because it is always speeding upĭ.) yes this is possible, and a rock thrown straight up is an example D.) yes this is possible, and a rock thrown straight up is an example When an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion?Ĭ.) both its acceleration and its velocity are constantĭ.) neither its acceleration nor its velocity is constant A.) its acceleration is constant You are standing in a moving bus, facing forward and you suddenly fall backward.

Physics 101 ub test quizlet