Question

name ( ) date 9/25/25 period 2nd
5 newtons 2nd law of motion can be stated as: a an object at rest stays at rest, an object in motion stays in motion, unless acted on by an outside force. b the greater the mass of an object, the more force it will take to accelerate the object. c for every action, there is an equal and opposite reaction. d opposite forces attract.
6 acceleration is a slowing down. b. speeding up. c changing direction. d all of these
7 t or f: as the mass of an object increases, its acceleration decreases.
8 t or f: it takes more force to push an empty shopping cart than a full one
9 t or f: albert einstein came up with the laws of motion.
10 a batter hits a baseball with 500 n of force, the ball is accelerated at 25 m/s² what is the balls mass?

Explanation:

Step1: Recall Newton's 2nd Law of Motion

Newton's 2nd Law is $F = ma$ (Force equals mass times acceleration), meaning greater mass requires more force for acceleration.

Step2: Answer question 5

The statement "The greater the mass of an object, the more force it will take to accelerate the object" is Newton's 2nd Law. So the answer for 5 is b.

Step3: Recall the definition of acceleration

Acceleration is a change in velocity, which includes speeding up, slowing down, and changing direction. So the answer for 6 is d.

Step4: Analyze question 7

From $F=ma$, when force is constant, as mass $m$ increases, acceleration $a$ decreases. So the answer for 7 is T (True).

Step5: Analyze question 8

A full shopping - cart has more mass than an empty one. From $F = ma$, more force is needed to push the full cart. So the answer for 8 is F (False).

Step6: Recall the scientist for laws of motion

Isaac Newton came up with the Laws of Motion, not Albert Einstein. So the answer for 9 is F (False).

Step7: Solve question 10

Using $F = ma$, we can solve for $m=\frac{F}{a}$. Given $F = 500N$ and $a=25m/s^{2}$, then $m=\frac{500}{25}=20kg$.

Answer:

1. b. The greater the mass of an object, the more force it will take to accelerate the object.
2. d. all of these
3. T
4. F
5. F
6. 20 kg