what change would increases the acceleration of the dog sled?
A. run the sled up a hill
B. remove a dog from the sled
C. add another dog to the sled
D. add more mass to the sled
C. add another dog to the sled
To increase the acceleration of a dog sled, the best option would be to add another dog to the sled.
To determine which change would increase the acceleration of the dog sled, let's consider the basic principles of physics.
Acceleration is directly proportional to the net force acting on an object and inversely proportional to the mass of the object. In simpler terms, to increase acceleration, we need to either increase the net force or decrease the mass.
A. Running the sled up a hill: This change would require the sled to work against gravity, which could increase the net force acting on the sled, therefore increasing acceleration. However, running uphill would also increase the resistance or friction, which could decrease acceleration. So, while this change may have some impact, it is not the most effective choice.
B. Removing a dog from the sled: By removing a dog from the sled, the mass of the sled and its cargo would decrease. According to Newton's second law of motion (F = ma), decreasing the mass of the sled would increase acceleration, assuming the net force remains constant. Therefore, removing a dog from the sled is a viable option to increase acceleration.
C. Adding another dog to the sled: Adding another dog to the sled would increase the overall mass of the sled and its cargo. As mentioned earlier, acceleration is inversely proportional to the mass, so adding more mass would decrease acceleration.
D. Adding more mass to the sled: Adding more mass to the sled would increase its total mass, and as mentioned before, acceleration is inversely proportional to mass. Therefore, adding more mass to the sled would decrease acceleration.
Based on these explanations, the correct choice to increase acceleration would be B. Removing a dog from the sled.