Astudent pulls a sled of mass m = 82.0 kg with a force of f = 160n, and the force makes an angle of θ = 15 degrees with respect to the horizontal. ignoring friction the normal force exerted on the sled by the ground is a) 649.05n;
b) 762.2n;
c) 527.90n;
d) 845.01n;

If a balloon is taken outside on a very cold day, what will occur?

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?