Answer:
B: Horizontally to the left
Explanation:
Horizontal velocity is always constant throughout the entire trajectory of the rocket and acts in the horizontal direction in which the rocket was launched. This is because gravity only acts in the downwards vertical direction.
So in order words at peak height, horizontal velocity is in the horizontal direction in which the rocket was launched.
So if it was to the left, then direction is left but if right, then direction is right.
Looking at the options, the most appropriate will be:
Horizontally to the left
Answer:
The speed of the train is 80 miles/hour.
Explanation:
Given:
Distance from Spokane to Seattle = 280 miles
The trip from Spokane to Seattle by train took = 3.5 hours
To find the speed of the train.
Solution:
The speed is the distance per unit time. So, to find the speed of the train we will divide the total distance of the trip by the time taken to complete the trip by the train.
Thus, the speed of the train is 80 miles/hour.
Forward and downward speed are referred to as acceleration and deceleration respectively.
<h3>
What is Acceleration?</h3>
This is the rate at which an object gains speed with respect to time with its unit being meter per second square(m/s²).
Objects in constant speed are said to have a uniform motion. The downward speed is known as deceleration which involves the object losing speed to return to a state of rest.
Read more about Acceleration here brainly.com/question/460763
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Answer:
a) Therefore 2.6km is greater than 2.57km.
Statement A is greater than statement B.
b) Therefore 5.7km is equal to 5.7km
Statement A is equal to statement B
Explanation:
a) Statement A : 2.567km to two significant figures.
2.567km 2. S.F = 2.6km
Statement B : 2.567km to three significant figures.
2.567km 3 S.F = 2.57km
Therefore 2.6km is greater than 2.57km.
Statement A is greater than statement B.
b) statement A: (2.567 km + 3.146km) to 2 S.F
(2.567km + 3.146km) = 5.713km to 2 S.F = 5.7km
Statement B : (2.567 km, to two significant figures) + (3.146 km, to two significant figures).
2.567km to 2 S.F = 2.6km
3.146km to 2 S.F = 3.1km
2.6km + 3.1km = 5.7km
Therefore 5.7km is equal to 5.7km
Statement A is equal to statement B
Answer:
Explanation:
Electrostatic Force
It's the force that appears between two electrical charges q1 q2 when they are placed at a certain distance d. The force can be computed by using the Coulomb's law:
We have an arrangement of 4 charges as shown in the image below. We need to calculate the total force exerted on the charge 2Q by the other 3 charges. The free body diagram is also shown in the second image provided. The total force on 2Q is the vectorial sum of F1, F2, and F3. All the forces are repulsive, since all the charges have the same sign. Let's compute each force as follows:
The distance between 3Q and 2Q is the diagonal of the rectagle of length l:
The force F3 is
Each force must be expressed as vectors. F1 is pointed to the right direction, thus its vertical components is zero
F2 is pointed upwards and its horizontal component is zero
F3 has two components because it forms an angle of 45° respect to the horizontal, thus
Now we compute the total force
Now we compute the magnitude
The direction of the total force is given by