Physics Review Torque, Momentum A mass of 65.0 g is placed at the 12 cm mark of a uniform meterstick. If the support is placed at the 24 cm mark, find the mass of the meterstick. A 955 N footbridge is 10.0 m long with supports 0.8 m from each end. Three people are walking across the bridge. Tom has a weight of 750 N and is 4.0 m across the bridge. Sue has a weight of 550 N and is 6.2 m across the bridge. Jack has a weight of 820 N and is 7.8 m across the bridge. Find the force of each bridge support. A torque of 28 Nm is required to turn a bolt. Where must the wrench handle be held if the force applied is 45 N? A uniform 15 kg pry bar , 2.0 m long, is used to lift a 700 N rock. The bar is supported on a smaller rock 0.6 m from the rock to be lifted. What force must be applied to the end of the bar to lift the large rock? Abby (m = 66.0 kg) must take her little brother Bryce (m = 38.0 kg) to the playground. Bryce climbs onto one side of a seesaw 1.5 m from its center. How far on the other side must Abby sit to balance her brother? Calculate the impulse if a Force of 100 N is applied to an object for 0.20 seconds. If the object has a mass of 20 kg, what velocity will it move following the application of the force? Two 0.250 kg carts collide and stick together after the collision. Cart 1 is moving 2.75 m/s to the right before the collision and cart 2 is moving 1.95 m/s to the left before the collision. Calculate the magnitude and direction of the velocity of the carts after colliding. Calculate and compare the momentum of the following: a 4000 N truck moving at 10 m/s and a 2500 N car moving at 25 m/s. A 200 kg asteroid collides with a satellite with a mass of 3500 kg. The satellite was moving at 10.25 m/s before the collision and 11.45 m/s after the collision. Determine the impact speed of the asteroid