Numbers 1-9 are true and false questions.Check if my answers are right and if I didn't write anything on the blank, I need help with them. Thanks!!!!
_____ 1. Velocity could be reported as 50 k/hr.
True 2. How far an object travels in a certain period of time is its speed.
_____ 3. You should indicate direction when reporting speed.
True 4. Every moving object has inertia.
True 5. Forces can make moving objects stop or slow down.
______ 6. A moving skateboard is an example of action and reaction forces at work.
True 7. When a frog jumps from a leaf, the force of the leaf on the frog is the reaction force.
False 8. Objects weigh more on the moon than on Earth.
True 9. Friction always pushes in the opposite direction to the way an object is moving.
hello......., can someone help me please?:(
_____ 3. You should indicate direction when reporting speed. TRUE OR FALSE
To check the accuracy of your answers, let's go through each statement one by one:
1. Velocity could be reported as 50 k/hr.
To determine if this statement is true or false, we need to understand the definition of velocity. Velocity is a vector quantity that includes both speed and direction. It represents an object's displacement per unit time. In the given statement, only the speed is mentioned (50 k/hr) without any direction. Therefore, this statement is incomplete, and we cannot determine if it is true or false. Additionally, the unit "k/hr" is not a recognized unit, so it is incorrect.
2. How far an object travels in a certain period of time is its speed.
This statement is true. Speed is a scalar quantity that measures the rate at which an object covers distance. Speed does not take into account the direction, so the statement is correct.
3. You should indicate direction when reporting speed.
This statement is true. Since speed is a scalar quantity, it only represents the magnitude or numerical value and does not include direction. However, if you want to describe the velocity (which includes both speed and direction), then you should indicate direction.
4. Every moving object has inertia.
This statement is true. Inertia is the tendency of an object to resist changes in its state of motion. All objects, whether moving or at rest, possess inertia.
5. Forces can make moving objects stop or slow down.
This statement is true. Forces can change the motion of objects. If a force opposes the direction of motion, it can slow down or completely stop a moving object.
6. A moving skateboard is an example of action and reaction forces at work.
This statement is true. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. When a skateboard moves, the wheels exert a backward force on the ground (action), and the ground exerts an equal and opposite force on the skateboard (reaction).
7. When a frog jumps from a leaf, the force of the leaf on the frog is the reaction force.
This statement is false. In this scenario, the force of the leaf on the frog is the action force. According to Newton's third law of motion, when the frog pushes off the leaf to jump, an equal and opposite force (reaction) is exerted by the frog on the leaf.
8. Objects weigh more on the moon than on Earth.
This statement is false. Weight is the force experienced by an object due to gravity. Since the moon has less mass and gravitational pull than the Earth, objects weigh less on the moon than on Earth.
9. Friction always pushes in the opposite direction to the way an object is moving.
This statement is true. Friction is a force that opposes motion. It acts in the direction opposite to the motion of an object.
Based on the explanations provided, only statements 2, 3, 4, 5, 6, and 9 are correct. Statements 1, 7, and 8 are either incomplete or incorrect.