Question

Can You Please Help me with these 5 questions

Answer 1

Answer:

1. A

Work = force . displacement

W = F . S = FS Cos 0

2. D

Energy due to motion of particle calls kinetic energy

3. D

Thermal energy , due to vibration of molecules

4. 2 kg

Since kinetic energy

$k = \frac{1}{2} m {v}^{2} \\ \\ 25= \frac{1}{2} \times m \times {5}^{2} \\ \\ m = 2 \: kg$

5. D

Centripetal force keeps particle in circular path , it's direction always remain towards centre