Answer:
0.198 s
Explanation:
Consider the motion of the block before collision
= initial velocity of block as it is dropped = 0 m/s
= acceleration = - g
= time of travel
= final velocity of block before collision
Using the kinematics equation
= mass of the bullet = 0.026 kg
= velocity of block just before collision = 750 m/s
= mass of the block = 5 kg
= final velocity of bullet block after collision = gt
Using conservation of momentum
Answer: D
Explanation: The chemical bonds in the food store energy that is released when we eat it.
Answer: east and west
Explanation:The east
to west daily motions of stars, planets, the Moon, and the Sun are caused by the rotation of the Earth on its axis. The Earth and all the planets revolve around the Sun on circular orbits.
Answer:
The process of making alloys involves ( Heating ) pure metals to remove impurities. Then the pure metals are(mixed) with other components. An alloy is a mixture of metals or a mixture of a metal and another element. Alloys are defined by a metallic bonding character.
Explanation:
Answer:
- 9m/s²
Explanation:
Given parameters:
Initial velocity = 40m/s
Time taken = 3s
Final velocity = 13m/s
Unknown:
Acceleration of the car = ?
Solution:
Acceleration is the rate of change of velocity with time taken.
Acceleration = 
Acceleration = 
= - 9m/s²
