convex lenses.
eyeglasses with convex lenses increase refraction, and accordingly reduce the focal lenght
Answer:
3.2 seconds
Explanation:
When the cars collide, they have the same position.
x₁ = x₂
-4 + 1.1t = 8.8 − 2.9t
4t = 12.8
t = 3.2
Answer:
If the weight and forces are the same, it will result in a balance, i they are different, it will result in an overload in the lower force/mass object, reflecting it to the opposite direction with higher speed.
Explanation:
Explanation:
Given that,
Mass of the shopping cart, 
Initial speed of the shopping cart, 
Mass of the box, 
Initial speed of the box,
(at rest)
They stick together and continue moving at a new velocity. It is a case of inelastic collision.
(a) The momentum of the shopping cart before the collision is given by :

(b) The momentum of the box before the collision is given by :

(c) The velocity of the combined shopping cart/box wreckage after the collision is given by using the conservation of momentum as :

Hence, this is the required solution.
Time= s/v
Speed =5km/h
Time=30min
Distance is required
Distance=time*speed
30min*5km/h=600m