BER At a construction site, a brick with a mass of 1.5 kg is perched 34.5 m above the ground. What is the brick's potential energy? Formula: Work with Units: Variables with units: Fina: Answer with maits:

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .

It's time for santa to deliver his presents. assuming he delivers presents all over the world, he has to travel about 75,000,000 miles. if he travels east to west, he can use the time zones to make christmas day last 31 hours. what speed, in miles per hour, must santa fly to get all of his presents delivered?