Hey there!
A ball rolls 3 times. If she adds the three measurements and divides it by 3, it means that this is the average speed. The average speed is found by adding all measurements and dividing by the amount of numbers.
I hope this helps!
Answer:
The Frequency of the wave is 0.2Hertz
The period is 2seconds
Explanation:
We are asked to find the frequency and period
Frequency is the number of oscillations completed in one seconds
If five waves were made from the same source in 10 seconds, hence;
Frequency = number of oscillation/Time
Frequency = 5/10
Frequency = 0.5Hertz
Next is to get the period
Period = 1/Frequency
Period = 1/0.5
Period = 2seconds
Work done by a given force is given by
here on sled two forces will do work
1. Applied force by Max
2. Frictional force due to ground
Now by force diagram of sled we can see the angle of force and displacement
work done by Max = 
Now similarly work done by frictional force
Now total work done on sled
Answer:
a) One
Explanation:
In a uniform circular motion there must be a force acting to keep it in the circular track. This force can either be centripetal or a centrifugal force.
According to the Newton's first law of motion a particle continues to be in state of rest or in uniform motion until acted upon by an external force.
Here the term uniform motion need to be understood which refers to the uniform velocity of the particle in accordance to the vector laws.
<u>Answer:</u>
Option: D. Gravity is pulling the crash test dummy in the direction the car is moving.
<u>Explanation:
</u>
When a car accelerates from a standing start, the crash test dummy appears to be pressed backward into the seat cushion because the gravity is pulling the crash test dummy in the direction the car is moving.
Basically when the car is starting, the person inside is in static position and the car is going to move. So it is putting a force on the person to move on the same speed. But as the person is sitting static hence gravity is pulling him behind from moving. Hence, The dummy appears to be pressed backward.
