In attempting to pull a 1500 kg car out of a ditch, al exerts a force of 200 n for 5 s, bill exerts a force of 500 n for two s, and clyde exerts a force of 300 n for four seconds. the car does not move at all. who provided the greatest impulse?

Clyde will provide greater impulse

Explanation:

We have given that Al exerts a force of 200 N for 5 sec

We know that impulse is given by, impulse = force ×time = 200×5 =1000 N-s

Bill exerts a force of 500 N for 2 sec

So impulse = 500×2 = 1000 N-s

Now the force exerted by Clyde 300 N for 4 sec

So impulse = 300×4 = 1200 N-s

From above calculation we can see that Clyde provide greater impulse than any other

b.a device that inputs heat into a cool object

reserve is the answer