Answer:
Question 1: D
Question 2:D
Explanation:
Question 1: D
Question 2
mass=m=65kg
Acceleration due to gravity=g=9.8m/s^2
Height=h=7 meters
Potential energy=m x g x h
Potential energy=65 x 9.8 x 7
Potential energy=4459 joules
Answer:
The speed is 1.5 m/s.
Explanation:
Given that,
Distance = 3 m
Time = 2 sec
We know that,
The position and time graph shows the speed of motion.
We need to calculate the speed
Using formula of speed
Where, d = distance
t = time
Put the value into the formula
Hence, The speed is 1.5 m/s.
Sodium mixed with chloride
3. It is not changing at that time
Explanation:
If the acceleration of a body is zero at some instant in time, it implies that the velocity is not changing at that point in time. Velocity is the rate of change of displacement with time.
✓Acceleration and velocity shares a very close relationship.
✓ For a body to accelerate, the velocity must change. Acceleration is defined as the rate of change of velocity with time.
✓If at any point, a body moves with constant velocity i.e the velocity does not change with time, the acceleration becomes zero.
✓ For acceleration to occur, a body must change velocity.
Learn more:
Acceleration brainly.com/question/6323625
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Answer:
1
Explanation:
Because theyre heading opposite directions