To lessen the negative impacts of the force generated during a collision, safety belts and occupant protective relays are installed.
Importance of safety belts:
- The purpose of a seat belt usually referred to as a safety belt or a safety belt, is to protect the driver or an occupant of a vehicle from a potentially dangerous movement that may occur during an accident or an abrupt stop. By minimizing the power of secondary hits with interior striking hazards, maintaining proper occupant positioning for the airbag, and preventing people from being expelled from the vehicle after an accident or if the automobile rolls over, seat belts help minimize the chance of a fatal accident in traffic collisions. When the car is moving, the passenger and the driver move together with it at the same pace.
- The occupants continue moving at the same pace the vehicle was traveling at when it stopped if it unexpectedly stops or crashes. To stop the driver and other passengers from exiting the vehicle or contacting the interiors of the vehicle, seatbelts apply an equal and opposite force to them. Due to their crucial function in occupant safety, seatbelts are regarded as the main restraint devices.
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Answer:
recoil speed is 9 m/s
Explanation:
given data
cannon mass = 100 kg
cannonball = 10 kg
speed = 90 m/s
solution
we use here the law of conservation of momentum
as total momentum of the cannon and cannonball both before and after the shot will be conserve
and before shot
total momentum p = 0 ..............1
and
After the shot
the total momentum p = mv + MV .............2
and
momentum is conserved so we can say from both equation
0 = mv + MV
put here value and we get
V = 
V = 
V = -9 m/s
here V = -9 m/s negative sign show that cannon will move in the opposite direction to the cannonball
so that recoil speed is 9 m/s
The redshirting of the spectra of distant galaxies. They are moving away from us at a rate proportional to their distance
it works by using a really hot substaince to melt something together.
