In the following diagram, the greem ball changes direction after colliding with the red ball because the red ball has more momentum.
True <----
False
2. What is the momentum of a 20.0 kg scooter traveling at 5.00 m/s.
4.00 kg m/s
20.0 kg m/s
25.0 kg m/s
100 kg m/s <----
3. Which of the following describes the relationship between friction and inertia?
When there is more friction, there is less inertia
When there is less friction, there is more inertia
When there is more friction, there is more inertia <----
When there is no friction,there is more inertia
4. Jellyfish sometimes squeeze in the sides of their bodies. This pushes a stream of water from the back end of their bodies. According to Newton's third law of motion, how will this behavior affect the movement of the jellyish?
The jellyfish will move forward
The inertia of the jellyfish will increase <----
the Jellyfish will move backward
The jellyfish will stay still.
5. Which of the following would have less momentum than a 52 kg cheetah at 10 m/s
a 71 kg lion running at 10 m/s
a 45 kg zebra running at 13 m/s <---
a 5,000 kg elephant walking at 1 m/s
a 61 kg zebra running at 8.0 m/s
6. According to Newton's third law of motion, if a rolling ball collides with a wall and exerts a force of 3N on that wall, how much force does the wall excert back on the ball.
0 N
3 N <---
6 N
9 N
7. After an avalanche, a huge block of stone slid down a mountain and landed in the middle of a road. People in the nearby town had a very difficult time moving it out of the road. The block of stone is difficult to move because
it has a high amount of momentum
has balanced forces acting on it
it has a high amount o inertia
has unbalanced forces acting on it <---
8. Which of the following statements is true about a collison between two cars?
The total momentum after the collision is the same as the total momentum befor the collision
The total momentum after the collision is greater than the total momentum beforethe collision <---
The total momentum after the collision is less than the total momentum before the collision
The total momentum after the collision is zero.
Please check my answers!! THANKS IN ADVANCE @DAMON
hello mrs sue or damon can u help?? Are these answers correct
no all wrong
i just took the test and majority of these answers are correct!
Which answers are correct nae?
Let's go through each question one by one and check your answers:
1. In the following diagram, the green ball changes direction after colliding with the red ball because the red ball has more momentum.
- False
Explanation: The change in direction of the green ball is due to the conservation of momentum. Momentum is conserved in a collision, meaning the total momentum before and after the collision remains the same. The change in direction occurs because the red ball transfers some of its momentum to the green ball.
2. What is the momentum of a 20.0 kg scooter traveling at 5.00 m/s.
- 100 kg m/s
Explanation: Momentum is calculated by multiplying the mass and velocity of an object. In this case, the momentum of the scooter can be calculated as: momentum = mass * velocity = 20.0 kg * 5.00 m/s = 100 kg m/s.
3. Which of the following describes the relationship between friction and inertia?
- When there is more friction, there is less inertia.
Explanation: Inertia is the resistance of an object to changes in its motion. Friction opposes motion. When there is more friction, it makes it more difficult for an object to move, thus reducing its ability to resist changes in motion, which is inertia.
4. Jellyfish sometimes squeeze in the sides of their bodies. This pushes a stream of water from the back end of their bodies. According to Newton's third law of motion, how will this behavior affect the movement of the jellyfish?
- The inertia of the jellyfish will increase.
Explanation: Newton's third law of motion states that for every action, there is an equal and opposite reaction. When the jellyfish squeezes its body, pushing water backward, the action creates a reaction force that propels the jellyfish forward. Therefore, the movement of the jellyfish is influenced by this behavior.
5. Which of the following would have less momentum than a 52 kg cheetah at 10 m/s?
- A 45 kg zebra running at 13 m/s.
Explanation: To compare momentum, we need to calculate momentum for each situation. The momentum of the cheetah can be calculated as: momentum = mass * velocity = 52 kg * 10 m/s. Similarly, we calculate the momentum for each option and find that the momentum of a 45 kg zebra running at 13 m/s is smaller than that of the cheetah.
6. According to Newton's third law of motion, if a rolling ball collides with a wall and exerts a force of 3N on that wall, how much force does the wall exert back on the ball?
- 3 N
Explanation: Newton's third law states that for every action, there is an equal and opposite reaction. Therefore, the wall exerts an equal and opposite force of 3 N back on the ball.
7. After an avalanche, a huge block of stone slid down a mountain and landed in the middle of a road. People in the nearby town had a very difficult time moving it out of the road. The block of stone is difficult to move because:
- It has unbalanced forces acting on it.
Explanation: The block of stone is difficult to move because it experiences a significant unbalanced force, likely due to its weight and friction between the stone and the road surface.
8. Which of the following statements is true about a collision between two cars?
- The total momentum after the collision is greater than the total momentum before the collision.
Explanation: In a collision between two cars, the total momentum is conserved, meaning the total momentum before the collision is equal to the total momentum after the collision. Therefore, the given statement is false.
Based on the explanations provided, your answers for questions 1, 2, 3, 4, 5, 6, and 7 are correct. However, your answer for question 8 is incorrect.