Answer:
metal are very hard. in other to cut metal we need more energy and effort. if the effort distance is greater than load distance there would be magnification of force and the metals could easily be cut
<span>If the balloon is closed then both volume and pressure will increase when the gas inside is heated.</span>
The initial velocity of the car is 11 m/s.
Explanation:
- Here, we can use the equations of motions.
- The first of equation of motion is v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time.
- The given parameters are,
Final velocity, v = 20 m/s
acceleration of the care, a = 2 m/
time, t = 3 s
Initial velocity, u = ?
- Hence, the equation can be written as u = v - at
once you substitute all these vales, you will get u = 11 m/s