The dog sled will experience positive acceleration if:
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they add bags to the sled.
they add a dog to the sled.
they add a person to the sled.
all of the above
all of the above
How does a spacecraft leave the surface of the Earth?
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The spacecraft produced an upward force of thrust that was equal to the downward force of gravity.
The spacecraft produced an upward force of thrust that was greater than the downward force of gravity.
The spacecraft produced a downward force of thrust that was equal to the downward force of gravity.
The spacecraft produced a downward force of thrust that was less than the downward force of gravity.
The spacecraft produced an upward force of thrust that was greater than the downward force of gravity.
All of the above. Adding bags to the sled, adding a dog to the sled, and adding a person to the sled will increase the total mass of the sled. According to Newton's second law of motion (F=ma), when the mass of an object increases, a greater force is required to accelerate it. Therefore, in order to maintain the same force, the sled will experience a positive acceleration when any of these additions are made.
To determine which scenario would result in positive acceleration of the dog sled, we need to understand the concept of acceleration. Acceleration refers to the rate at which an object's velocity changes. If an object is experiencing positive acceleration, it means that its velocity is increasing.
In the context of a dog sled, we can consider several factors to determine whether it will experience positive acceleration:
1. Adding bags to the sled: This would increase the total mass of the sled. According to Newton's second law of motion, which states that force is equal to mass times acceleration (F = ma), if the mass of the sled increases while the force applied remains constant, the acceleration will decrease. Therefore, adding bags to the sled would not result in positive acceleration.
2. Adding a dog to the sled: Dogs can exert a pulling force on the sled, contributing to its forward motion. By adding more dogs to the sled, the total pulling force increases. According to Newton's second law, if the force applied on the sled increases while the mass remains constant, the acceleration will increase. Therefore, adding a dog to the sled could result in positive acceleration.
3. Adding a person to the sled: Similar to adding a dog, the presence of a person can contribute to the pulling force exerted on the sled. If the person actively pushes or pulls the sled, they can increase the forward force, potentially leading to positive acceleration.
Considering all of the above scenarios, it is safe to say that "all of the above" (adding bags, a dog, or a person) could result in positive acceleration of the dog sled, depending on specific conditions and variables.