12 A refrigerator can be lifted a distance of h using two methods One method, (2) called "lift involves lifting the refrigerator vertically using a forklift The other
method, called "push"Involves pushing the refrigerator up a ramp
Lift
Push
Ignore friction between the refrigerator and the ramp If the refrigerator is moved at
the same constant speed during both motions, which of the following statements are
true?
B
Less applied force is exerted on the refngerator during the "push
The refrigerator gains more mechanical energy during the lift"
More work is done on the refrigerator by the applied force during the
push
The refrigerator gains more mechanical energy during the "push
D

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.