Alice's speed relative to the water should be 0.6 m/s in order to target the spot 90 meters south of the starting point on the bank of the other side.
<h3>What is relative velocity?</h3>
Relative velocity refers to the velocity of an object with respect to another observer.
Velocity is speed in a given direction and is a vector quantity.
- Velocity = displacement/time
There is relative velocity between Alice and the water.
Let Alice's velocity relative to the river be x
Time it will take her to cross the river = 45/x
The displacement of the river in that time is given below as;
Displacement = velocity * time
Velocity of river = 1.20 m/s
time, t = 45/x
d = 90 m
90 = 1.2 * 45/x
90x = 54
x = 54/90
x = 0.6 m/s
Therefore, Alice's speed relative to the water should be 0.6 m/s.
In conclusion, relative velocity is the velocity of one object from the reference point of another object.
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Answer:
it's important because it shows how thermal energy transforms or continues to be all around us in everything
Answer:
<h2>4 kg</h2>
Explanation:
The mass of the object can be found by using the formula
f is the force
a is the acceleration
From the question we have
We have the final answer as
<h3>4 kg</h3>
Hope this helps you
Perpendicular slope would be 1/3. so the equation will be Y=1/3x -4
According to the given statement Final velocity when they stick together is 8.735i^ + 11.25j^
<h3>What is collision and momentum?</h3>
The unit of momentum is kg ms -1. Momentum is a vector parameter that is influenced by the object's direction. During collisions involving objects, momentum is a relevant concept. The final velocity before a collision between two objects equals the total motion after the impact (in the absence of external forces).
<h3>Briefing:</h3>
From conservation of momentum
Initial momentum = final momentum
m u +M U =(m+M) V
2000×25 i^ +1500×30 j^ =(2000+1500) V
V = 8.735i^ + 11.25j^
Final velocity when they stick together is 8.735i^ + 11.25j^
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The complete question is -
A 2000 kg truck is moving eastward at 25 m/s. it collides inelastically with a 1500 kg truck traveling southward at 30 m/s. they collide at the intersection. Find the direction and magnitude of velocity of the wreckage after the collision, assuming the vehicles stick together after the collision.