Here are the answers to your homework questions, explained simply.
1.
It increases.
*(According to Newton's Second Law, more force means more acceleration.)*
2.
Newton (or N)
3.
This happens because of inertia (Newton's First Law). The cake was moving forward at the same speed as the car. When the car stopped suddenly, the cake wanted to keep moving forward. Since nothing was holding it down, it slid off the seat and fell.
4.
Charlie has more mass than Nina. Because he is bigger/heavier, his body has more inertia. This means he hits the water with more force, pushing more water out of the way and creating a bigger splash.
5.
Zero (or 0 m/s²).
*(If forces are balanced, they cancel each other out, so there is no change in motion.)*
6.
An unbalanced force (or a net force).
7.
Because of air resistance and gravity. Air pushes against the ball to slow it down, and gravity pulls it back toward the ground.
8.
Action-reaction pairs.
9. You should circle:
*
A seatbelt in a car (keeps you safe by stopping you from flying forward).
*
The brakes on a car (uses friction to stop the wheels).
*
The wheels on a bicycle (uses friction to grip the road so you don't slip).
*(Note: A skateboard ramp usually tries to reduce friction so you can go fast, whereas the others use friction to help control or stop motion.)*
10.
Newton’s Third Law
11.
First (Newton's First Law)
12.
False
*(Gravity actually makes objects speed up as they go down a hill, not slow down.)*
13.
True
*(The tennis ball has much less mass than the bowling ball, so the same force will make it accelerate much faster and travel farther.)*
14.
Newton’s Second Law ($F=ma$)
15.
Newton would support seatbelt laws because of his First Law (Inertia). This law says that an object in motion stays in motion unless acted upon by an outside force. If a car crashes and stops suddenly, the passengers inside will keep moving forward at the car's original speed. A seatbelt provides the "outside force" needed to stop the passenger safely so they don't hit the dashboard or windshield.
Parent Tip: Review the logic above to help your child master the concept of newton laws worksheet answers.
