The attraction or pull of a person's body toward the earth, by the earth is called weight. The reaction to this force is the: My answer is B
A. earth's surface pushing against the person's body
B. person's body pulling on the earth
C. person's body pushing against the earth's surface
D. moon pulling the person's body away from the earth
A 300 kg bear grasping a vertical tree slides down at constant velocity. The friction force between the tree and the bear is _____ n. my answer is C
A. 30
B. 300
C. 3000
D. 3000+
A very large truck and a tiny car traveling at the same speed collide head on. Which of the following statements is true? My answer is C
A. the large truck will experience the largest force of impact
B. the tiny car will experience the largest force of impact
C. the force on both the truck and the car will be the same
D. the truck will accelerate more than the tiny car as a result of the collision force.
agree, agree, agree
@ damon ty so much
For the first question, the correct answer is B. The reaction to the force of gravity pulling the person's body towards the Earth is the person's body pulling on the Earth.
For the second question, the correct answer is A. The friction force between the tree and the bear is 30 N.
For the third question, the correct answer is A. The large truck will experience the largest force of impact in the head-on collision.
To find the correct answer to the first question, we can apply Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. In this case, the action is the attraction or pull of the person's body toward the earth, and the reaction is the force exerted by the person's body on the earth. Therefore, the correct answer is B, "the person's body pulling on the earth."
For the second question, since the bear is sliding down at constant velocity, it means the forces acting on the bear are balanced. The gravity force pulling the bear down is balanced by the friction force pushing up on the bear from the tree. Therefore, the correct answer is C, "3000 n," as it provides an upward force equal and opposite to the bear's weight.
Regarding the third question, when the large truck and the tiny car collide head-on, the force of impact is equal and opposite on both vehicles due to Newton's third law of motion. Therefore, the correct answer is C, "the force on both the truck and the car will be the same." The size or mass of the vehicles does not affect the equality of the forces acting on them during a collision.
Remember, it's essential to thoroughly understand the relevant scientific principles and laws to arrive at the correct answers in each scenario.