Question

a vehicle of mass 200 know is moving with a uniform velocity of 108 km/hour on a horizontal road . the force required to stop the vehicle in 5 sec is .​

Answer 1

Answer:

Crossword Puzzle

Across

4. A convex lens is _____ lens

6. An image which can be obtained on a screen

Down

1. A concave lens is _____ lens

2. An image which cannot be obtained on a screen

3. Any polished or a shining surface acts as a _______

5. One of the rainbow’s colours

Answer 2

The force required to stop the vehicle in 5 sec is 600N

Explanation:

• Given that Uniform velocity (u) = 108 km/hr², mass = 200kg, t = 5sec.
• v=a, v=u + at
• u=−a×(5/3600) ⇒ a = -1.5ms²
• f =ma ⇒ f= 200 × 3 = 600N