Bond is standing on a bridge, 10 m above the road below, and his pursuers are getting too close for comfort. He spots an approaching flatbed truck loaded with mattresses and decides to jump from the bridge onto the truck to make his getaway. He notes that the telephone poles the truck is passing are 20 m apart in this country and the time for the truck to cover this distance is 0.714 s. Estimating that the bed of the truck is 1.8 m above the road, Bond quickly calculates how many poles away the truck should be when he needs to jump. Assuming he jumps off just before the truck's front reaches a pole, how many poles are between Bond and the truck when Bond jumps off? I have no idea how to get started on this problem.. Advice please.