Answer:
Option B is correct.
Explanation:
Given data
Height of the hill = AB = 1 m
Distance traveled along the rough bottom surface = AC = 2 m
Now from the ΔABC


°
We know that the coefficient of kinetic friction is


0.5
This is the value of the coefficient of kinetic friction
Thus option B is correct.
Evaporate
Shape
I wish there were provided answer choices. Hope this helped
Answer:
A, C and D
Explanation:
The impulse is defined as the product between the force (F) and the time of the collision (t):

Let's apply the formula to calculate the impulse for each situation:
A) 
B) 
C) 
D) 
We see that the situations in which the impulse is equal to 10 units are:
A, C and D
Answer: x= 4.761 m/s
t=0.786 sec
Explanation: In a projectile motion (or 2D motion), the object is launched with an initial angle and an initial velocity
The components of the velocity are
<em>The magnitude, which is the speed, and the direction in which the motion is happening.</em>
Similarly the displacement has the components
The last formula is valid only if the object is launched at ground level, as our frog does.
There are two times where the value of y is zero, when t=0 (at launching time) and when it lands back from the air. We need to find that time t by making y=0
Dividing by t (assuming t different from zero)
Then we find the total flight as
Replacing this time in the formula of x
We can solve for
Knowing that x=2.20 m and °
We now compute t
Answer:
272.05 K; 489.69 °R; -1.11 °C
Explanation:
Fahrenheit can be converted to degrees Celsius using the following formula:
°C = 5/9 x (°F - 32) = -1.11 °C
The temperature in Kelvin is calculated from the temperature in degrees Celsius as follows:
K = °C + 273.15 = 272.05 K
The temperature on the Rankine scale is calculated from Kelvin as follows:
°R = 1.8K = 1.8(272.05) = 489.69 °R