A bowling ball has a mass of 7.2 kg and a weight of 70.6 N. It moves down the bowling alley at 1 m/s and strikes a pin with a force of 15.0 N. What is the force that the pin exerts on the bowling ball?
The answer is: 15.0 N
Answer:
Explanation:
The choices for this question are
Givens
However, to solve this we just need to use Newton's third law which states: "When an object exerts a force on another object, the second object will exert an equal and opposite force to the first object".
If the bowling ball strikes a pin with a force of 15N, then the pin will exert the same 15N on the bowling ball, but with the opposite direction. If the bowling force is positive, then the pin force will be negative.
Therefore, the right answer is the second choice 15N.
a change in color
a change in frequency
a change in speed
Answer: The correct answer is - change in speed.
When light travels from one transparent medium to another transparent medium, it bends and this phenomenon is known as refraction.
It is caused due to difference in the speed of light in different medium as speed of light is slow in a denser medium (like water) whereas speed is faster in a lighter medium (like air).
Answer : Yes, distance measurements based on the speed of light used for objects in space.
Explanation : A light year is measurement of distance that light travel in a one year.
In a one year light travels 9460000000000 kilometer.
We know that, speed of light is
and time is 31536000 seconds in 1 year
so, distance= speed of light X time
Now, the light year is
Example : The nearest star to earth is about 4.3 light year away.
component equal to 5 m/s and a vertical component
equal to 6 m/s.
At the highest point of the projectile's flight, what is (a) the horizontal component of its
velocity and
(b) the vertical component of its velocity?
Explain.
The horizontal component of a projectile's velocity remains constant throughout its flight. Hence, at the highest point, its value is the same as the initial, 5 m/s. The vertical component, on the other hand, becomes zero at the highest point.
For a projectile, the horizontal component of motion and the vertical component of motion are independent. Therefore, the horizontal component of velocity remains constant throughout the flight as long as there is no air resistance. Hence, at the highest point of a projectile's flight, the horizontal velocity (a) remains the same, i.e., 5 m/s.
However, for the vertical component, it is subjected to the acceleration due to gravity. At the highest point, the vertical component of velocity (b) becomes zero, because it has momentarily stopped before changing direction and accelerating downwards.
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Answer:Consider again the cannonball launched by a cannon from the top of a very high cliff. Suppose that the cannonball is launched horizontally with no upward angle whatsoever and with an initial speed of 20 m/s. If there were no gravity, the cannonball would continue in motion at 20 m/s in the horizontal direction. Yet in actuality, gravity causes the cannonball to accelerate downwards at a rate of 9.8 m/s/s. This means that the vertical velocity is changing by 9.8 m/s every second. If a vector diagram (showing the velocity of the cannonball at 1-second intervals of time) is used to represent how the x- and y-components of the velocity of the cannonball is changing with time, then x- and y- velocity vectors could be drawn and their magnitudes labeled. The lengths of the vector arrows are representative of the magnitudes of that quantity. Such a diagram is shown below.
Explanation: i hoped that helped!
B: 29 degrees
C: 32 degrees
D: 36 degrees
Answer:
Angle of refraction in the glass is 32 degrees
Explanation:
It is given that,
Maurice directs a beam of light on a sheet of glass at an angle, θ₁ = 51°
The refractive index of the glass is, n₂ = 1.46
We know that the refractive index of the air is, n₁ = 1
We have to find angle of refraction in glass i.e. θ₂
According to Snell's law :
Putting all the values we get :
Hence, the correct option is (c) " 32 degrees ".