A projectile is fired horizontally with a velocity of 98 m s–1 from the top of the hill 490 metre high.

Find :

(i) the velocity with which the projectile strikes

the ground.

(ii) time taken to reach the ground.

(iii) the distance of the target from the hill.

What are the factors that affect the resistance of a wire?

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block