Answer:
It will feel 4.85% lighter.
Explanation:
Normal weight of the gold bar = 5.0 × 9.81 = 49.05 N
The weight of the gold bar would be reduced because of the buoyant force acting upwards.
weight of the gold bar under water = normal weight - weight of the water displaced by the gold bar.
first, we need to find the volume (V) of the gold bar.
Percentage of decrease in weight
Answer:
false
Explanation:
Linear momentum is the product of an objects mass and velocity
p=m×v
Explanation:
Given that,
Mass of the baseball, m = 0.147 kg
The initial speed of the baseball, u = 42 m/s
The final speed of the baseball, v = -54 m/s (in opposite direction)
We need to find the magnitude of the change in momentum of the ball and of the impulse applied to it by the bat. The change in momentum is given by :
We know that the impulse applied to it by the bat is equal to the change in momentum. So, the impulse is 1.764 kg-m/s.
Answer:
14.7 J
Explanation:
PE=MGH
PE= 1.0 x 9.8 x 1.5 = 14.7 J
Answer:
D) It does not change
Explanation:
Since there is no friction in the inclined plane. Therefore, there is no loss in the total mechanical energy of the system. So according to the law of conservation of energy we can write:
Total Mechanical Energy at Start = Total Mechanical Energy at End + Frictional Loss
Total Mechanical Energy at Start = Total Mechanical Energy at End + 0
Total Mechanical Energy at Start = Total Mechanical Energy at End
It means there is no change in the total mechanical energy of the system.
Therefore, the correct option is:
<u>D) It does not change</u>