Review test # 2

... b. 1 N 1 kg = 1 m/s d. 1 N = 1 kg 1 m/s2 ____ 94. In the absence of air resistance, how would the acceleration of a 1.5 kg book and the acceleration of a 15 kg rock difer if the objects were dropped from the same height? a. The book would accelerate twice as fast as the rock. b. The rock would a ...

... b. 1 N 1 kg = 1 m/s d. 1 N = 1 kg 1 m/s2 ____ 94. In the absence of air resistance, how would the acceleration of a 1.5 kg book and the acceleration of a 15 kg rock difer if the objects were dropped from the same height? a. The book would accelerate twice as fast as the rock. b. The rock would a ...

Phys11U_Unit 2_Ch4_CE_ms_for_Questions

... You can measure the force of friction acting on a stationary object by pulling on it with a spring scale or a force meter. If you measure the largest force required to move the object, you will determine the maximum amount of friction the surface exerts on the object just before it starts to move. I ...

... You can measure the force of friction acting on a stationary object by pulling on it with a spring scale or a force meter. If you measure the largest force required to move the object, you will determine the maximum amount of friction the surface exerts on the object just before it starts to move. I ...

Physics Midterm Review Multiple Choice Identify the choice that best

... 53. Why does it require much less force to accelerate a low-mass object than it does to accelerate a high-mass object the same amount? 54. How do mass and weight vary with altitude? 55. Distinguish between mass and weight. 56. When a car is moving, what happens to the velocity and acceleration of th ...

... 53. Why does it require much less force to accelerate a low-mass object than it does to accelerate a high-mass object the same amount? 54. How do mass and weight vary with altitude? 55. Distinguish between mass and weight. 56. When a car is moving, what happens to the velocity and acceleration of th ...

1st semester EXAM review and key

... 38. Describe the graph of the vertical component of velocity versus time for the motion of the ball shown in the figure above. Identify any constants that would appear in the graph. 39. Why is force not a scalar quantity? 40. A block of wood supported by two concrete blocks is chopped in half by a k ...

... 38. Describe the graph of the vertical component of velocity versus time for the motion of the ball shown in the figure above. Identify any constants that would appear in the graph. 39. Why is force not a scalar quantity? 40. A block of wood supported by two concrete blocks is chopped in half by a k ...

Higher Physics Scholar ODU 2015

... ball travels upwards. At the highest point of its motion, the velocity is zero for a split second before the ball starts moving downwards. When it is moving back towards the Earth, the velocity of the ball is negative, because we have defined upwards as the positive direction. We have described the ...

... ball travels upwards. At the highest point of its motion, the velocity is zero for a split second before the ball starts moving downwards. When it is moving back towards the Earth, the velocity of the ball is negative, because we have defined upwards as the positive direction. We have described the ...

Chapter 11 Equilibrium - Farmingdale State College

... rotates in a counterclockwise direction. Even though the first condition of equilibrium holds, the body is not in complete equilibrium because the seesaw has tilted. It is obvious that the first condition of equilibrium is not sufficient to describe equilibrium. The first condition takes care of the ...

... rotates in a counterclockwise direction. Even though the first condition of equilibrium holds, the body is not in complete equilibrium because the seesaw has tilted. It is obvious that the first condition of equilibrium is not sufficient to describe equilibrium. The first condition takes care of the ...

Newton`s third law

... mass from the combination. How far does it stretch? Why? For the questions below, answer only in integer numbers of rubber bands 3. About how many identical rubber bands must be combined ( and how ) to stretch by l0 under the load of a 500 g mass? Try this. Calculate the force on each rubber band? ...

... mass from the combination. How far does it stretch? Why? For the questions below, answer only in integer numbers of rubber bands 3. About how many identical rubber bands must be combined ( and how ) to stretch by l0 under the load of a 500 g mass? Try this. Calculate the force on each rubber band? ...

chapter 3 part 1

... What happens if you are standing on a skateboard or a slippery floor and push against a wall? You slide in the opposite direction (away from the wall), because you pushed on the wall but the wall pushed back on you with equal and opposite force. Why does it hurt so much when you stub your toe? When ...

... What happens if you are standing on a skateboard or a slippery floor and push against a wall? You slide in the opposite direction (away from the wall), because you pushed on the wall but the wall pushed back on you with equal and opposite force. Why does it hurt so much when you stub your toe? When ...

Chapter 2: Forces

... you push or pull every day. You might push on computer keys, pull open a door, push a shopping cart, or pull a heavy backpack from the floor onto your shoulders. What happens when more than one push or pull acts on an object? ...

... you push or pull every day. You might push on computer keys, pull open a door, push a shopping cart, or pull a heavy backpack from the floor onto your shoulders. What happens when more than one push or pull acts on an object? ...

# Weight

In science and engineering, the weight of an object is usually taken to be the force on the object due to gravity. Weight is a vector whose magnitude (a scalar quantity), often denoted by an italic letter W, is the product of the mass m of the object and the magnitude of the local gravitational acceleration g; thus: W = mg. The unit of measurement for weight is that of force, which in the International System of Units (SI) is the newton. For example, an object with a mass of one kilogram has a weight of about 9.8 newtons on the surface of the Earth, and about one-sixth as much on the Moon. In this sense of weight, a body can be weightless only if it is far away (in principle infinitely far away) from any other mass. Although weight and mass are scientifically distinct quantities, the terms are often confused with each other in everyday use.There is also a rival tradition within Newtonian physics and engineering which sees weight as that which is measured when one uses scales. There the weight is a measure of the magnitude of the reaction force exerted on a body. Typically, in measuring an object's weight, the object is placed on scales at rest with respect to the earth, but the definition can be extended to other states of motion. Thus, in a state of free fall, the weight would be zero. In this second sense of weight, terrestrial objects can be weightless. Ignoring air resistance, the famous apple falling from the tree, on its way to meet the ground near Isaac Newton, is weightless.Further complications in elucidating the various concepts of weight have to do with the theory of relativity according to which gravity is modelled as a consequence of the curvature of spacetime. In the teaching community, a considerable debate has existed for over half a century on how to define weight for their students. The current situation is that a multiple set of concepts co-exist and find use in their various contexts.