Problemas
Which phenomenon is not related directly to Newton's 2nd law of motion? A. In horse racing, it's important that the jockeys (the riders) are light in weight. B. A shopping cart gets harder to push with the more groceries you add to it. B. A shopping can't gets have against a nearby wall will come back to you with nearly the force of your throw. D. If someone wants their car to go faster,they could get a more powerful engine remove some of the mass, or both. 11. Which of the following is NOT true of Newton's 3rd law: A. Forces always act in pairs B. Forces act in opposite directions C. Forces are equivalent in strength D. Forces cancel each other out
Roztwór
Jerónimo
maestro · Tutor durante 5 años
4.3
(220 Votos)
Respuesta
1. C2. D
Explicación
## Step 1The first question is about Newton's 2nd law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration (F=ma). This law explains how the velocity of an object changes when it is subjected to an external force.## Step 2Option A is related to the concept of momentum, which is the product of mass and velocity. The lighter the jockey, the less momentum they have, which is why they are easier to throw off a horse.## Step 3Option B is related to Newton's 2nd law. The more groceries you add to the shopping cart, the more mass it has, and the harder it is to push it.## Step 4Option C is related to Newton's 3rd law, which states that for every action, there is an equal and opposite reaction. When you throw a can against a wall, it comes back to you with nearly the same force as your throw.## Step 5Option D is related to Newton's 2nd law. If you want your car to go faster, you can either increase the force (by getting a more powerful engine) or decrease the mass (by removing some of the mass).## Step 6The second question is about Newton's 3rd law of motion, which states that for every action, there is an equal and opposite reaction.## Step 7Option A is true. Forces always act in pairs.## Step 8Option B is true. Forces act in opposite directions.## Step 9Option C is true. Forces are equivalent in strength.## Step 10Option D is false. Forces do not cancel each other out. They are equal in magnitude but opposite in direction.