Answer:
Explanation:
Let the velocity of projectile be v and angle of throw be θ.
The projectile takes 5 s to touch the ground during which period it falls vertically by 100 m
considering its vertical displacement
h = - ut +1/2 g t²
100 = - vsinθ x 5 + .5 x 9.8 x 5²
5vsinθ = 222.5
vsinθ = 44.5
It covers 160 horizontally in 5 s
vcosθ x 5 = 160
v cosθ = 32
squaring and adding
v²sin²θ +v² cos²θ = 44.4² + 32²
v² = 1971.36 + 1024
v = 54.73 m /s
Answer:
90
Explanation:
take note that V= (velocity is distance over (divided by) time. so in this case its 198(distance) divided by 2.2 (time) =90
Answer:
If you have a graph of an object's velocity vs. time, then the acceleration can be found by calculating the slope of the graph.
Answer:
photosynthesis uses carbon dioxide
Explanation:
Consider the following statements:
1. Carbon dioxide, chlorophyll, and sunlight are all essential for photosynthesis.
2. Rate of photosynthesis is maximum in red light and minimum in green light.
3. Increase
concentration decreases the rate of photosynthesis.
Which of the statements given above are correct about photosynthesis?
The initial speed of the ball is 5 m/s
Explanation:
We can solve the problem by using the law of conservation of momentum: in absence of external forces, the total momentum of the skater + ball system must be conserved. So we can write:
where:
m = 5 kg is the mass of the ball
u is the initial velocity of the ball
M = 45 kg is the mass of the ice skater
V = 0.5 m/s is the final velocity of the skater+ball together
Solving for u, we can find the initial velocity of the ball:
Learn more about momentum:
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