Parker wound a wire around a large iron nail. He then created an electromagnet by connecting the ends of the wire to different b
atteries. The table shows the current he measured for each electromagnet.
Which conclusion is best supported by the data?
A) Electromagnet W is the strongest.
B) Electromagnet X is weaker than electromagnet Z.
C) Electromagnet Y is the strongest.
D) Electromagnet Y is weaker than electromagnet X.
Which conclusion is best supported by the data?
A) Electromagnet W is the strongest.
B) Electromagnet X is weaker than electromagnet Z.
C) Electromagnet Y is the strongest.
D) Electromagnet Y is weaker than electromagnet X.
2 answers:
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Answer:
1. As rocket mass increases, acceleration decreases.
2. The inverse of the mass of the boat.
Explanation:
1. Newton's second law of motion states;
F = ma
where F is the force applied, m is the mass and a is the acceleration.
Therefore, increasing the mass of a rocket increases its weight which would reduce its acceleration provided that the force is constant. Thus, as rocket mass increases, acceleration decreases.
2. The slope of the graph can be expressed as;
From Newton's second law,
F = ma
Slope = (Δa) ÷ (ΔF)
Slope =
⇒ =
Therefore, the slope of the graph is the reciprocal of the mass of the boat.
Answer:
11.0 kg m/s
Explanation:
The impulse exerted on the cart is equal to its change in momentum:
where
m = 5.0 kg is the mass of the cart
is its change in speed
Substituting numbers into the equation, we find