copper statues are often made from sheets of copper what physical changes had to happen to the copper sheets to turn them into a
statue
1 answer:
You might be interested in
Answer:
Energy needed = 1100 kJ
Explanation:
Energy needed = Change in kinetic energy
Initial velocity = 15 m/s
Mass, m = 1600 kg
Final velocity = 40 m/s
Energy needed = Change in kinetic energy = 1280000-180000 = 1100000J
Energy needed = 1100 kJ
Positive acceleration occurs when an object speeds up.
Explanation:
Acceleration is the rate of change in velocity per unit time:
where is the change in velocity while
is the time interval. From the formula, we can understand that when
is positive, so when the object is speeding up, the acceleration is positive; on the contrary, when
is negative (so, when the object is slowing down), the acceleration is negative.