a - they can use a ball with less mass
b - they can use a ball with more mass
c - they can drop the same ball from a lower height
d - they can drop the same ball with less speed
( A Student drops a basketball into a pool from a height of 5 meters while a freind records the approximate splash height. they want to make a bigger splash in their next trial. how can they achieve this?)
To achieve a bigger splash in their next trial, the student can either increase the mass or the speed of the basketball.
a - They can use a ball with less mass: Using a ball with less mass allows it to accelerate more quickly and create a bigger splash when it hits the water.
b - They can use a ball with more mass: A ball with more mass will carry more momentum and therefore create a bigger splash upon impact.
c - They can drop the same ball from a lower height: Dropping the ball from a lower height will increase its speed upon hitting the water, resulting in a larger splash.
d - They can drop the same ball with less speed: They can decrease the initial velocity at which they drop the ball, allowing it to accelerate faster as it falls and create a bigger splash upon impact.
Any of these options can help the student achieve a bigger splash in their next trial.
which characteristic will be affected by increasing the speed of an object from 30 meters per second ( m / s ) to 40 meters per second ( m / 8 )?
a - mass
b - gravitational attraction
c - weight
d - kinetic energy
The characteristic that will be affected by increasing the speed of an object from 30 m/s to 40 m/s is kinetic energy.
d - Kinetic energy: The kinetic energy of an object is directly proportional to the square of its velocity. Therefore, by increasing the speed of the object, its kinetic energy will also increase.
watermelon a: Mass 4 Speed 2
watermelon b: mass 4 speed 4
Two watermelons fall off a kitchen counter. the masses and speeds of the fruits are in the table. how do the kinetic or the potential energies of the fruits compare?
a - the watermelon a has more kinetic energy
b - the watermelon b has more kinetic energy
c - both fruits have the same kinetic and potential energy
d - both fruits have only potential energy and no kinetic energy
To compare the kinetic and potential energies of the watermelons, we need to take into account the formulas for kinetic energy (KE) and potential energy (PE).
The formula for kinetic energy is KE = 0.5 * mass * speed^2.
The formula for potential energy is PE = mass * gravitational acceleration * height.
Given the information provided, we do not have the height of the fall or the gravitational acceleration (which is usually approximately 9.8 m/s^2 on Earth). Therefore, we can only compare the kinetic energies of the watermelons.
Comparing the kinetic energies, we can see that both watermelons have the same mass (4) but different speeds (2 for watermelon a and 4 for watermelon b).
Using the formula KE = 0.5 * mass * speed^2:
- For watermelon a: KEa = 0.5 * 4 * 2^2 = 8
- For watermelon b: KEb = 0.5 * 4 * 4^2 = 32
Comparing the kinetic energies, watermelon b has more kinetic energy than watermelon a.
Therefore, the correct answer is:
b - The watermelon b has more kinetic energy.
a student drops a 350 gram rock and a 500 gram rock into a pool from a height of 8 meters which statment about the investigation in accurate?
A - the 500 gram rock causes a smalller splash because it has more mass
B - the 350 rock causes a larger splash because it has less mass
C - the 500 gram rock causes a larger splash because it has more kinetic energy.
D - the 350 gram rock causes a smaller splash because it has more kinetic energy
The accurate statement about the investigation is:
A - The 500 gram rock causes a smaller splash because it has more mass.
When objects fall into a pool from the same height, the one with more mass will create a smaller splash because it requires more force to decelerate upon contact with the water. The larger mass of the 500 gram rock means it has more inertia and resists slowing down, resulting in a smaller splash compared to the 350 gram rock.
The other statements are not accurate:
B - The 350 gram rock causes a larger splash because it has less mass. (Incorrect - less mass usually leads to a smaller splash)
C - The 500 gram rock causes a larger splash because it has more kinetic energy. (Incorrect - kinetic energy alone does not determine the size of the splash)
D - The 350 gram rock causes a smaller splash because it has more kinetic energy. (Incorrect - kinetic energy alone does not determine the size of the splash)