Answer:
2. ( b ) zero
3. ( c ) 10 s
4. Uniform then decreasing
Explanation:
2.
Since the motion is uniform, initial and final velocity will be 0, hence acceleration will be zero.
3.
Initial velocity ( u ) = 5 m/s
Final velocity ( v ) = 35 m/s
Acceleration ( a ) 3 m/s^2
To find : Time ( t )
Formula : -
t = v - u / a
= 35 - 5 / 3
= 30 / 3
t = 10 s
I think A is the correct answer
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force
Large glowing balls of plasma held together by their own gravity are called stars
Answer:
Explanation:
Given:
- mass of nerf projectile,
- velocity of nerf projectile,
- mass of the gun,
Now in this case the collision can be assumed to be perfectly elastic.
<u>For an elastic collision:</u>
where:
recoil velocity of the gun
