You kick a soccer ball with a speed of 12 m/s at an angle of 21. How long does it take the ball to reach the top of its trajectory?

A car travels in a straight line for 4.1 h at a constant speed of 95 km/h. What is its acceleration? Answer in units of m/s 2.

You fire a 50-g arrow that moves at an unknown speed. it hits and embers in a 350-g block that slides on an air track. at the end, the block runs into and compresses a 4000-n/m spring 0.10 m.

When you take your clothes out of the dryer, immediately after it stops, the clothes often stick to your hands and arms. Which object is initially charged, your hands and arms or the clothing? Why?

As an object falls in a gravitational field, its speed increases. This is an example of potential energy transforming into what? A. chemical potential energy B. electrical potential energy C. elastic potential energy D. kinetic energy

Water flows through a horizontal coil heated from the outside by high temperature flue gases. as it passes through the coil water changes state from liquid at 200 kpa and 80 c to vapor at 100 kpa and 125 c.

You slide a box of books at constant speed up a 30° ramp, applying a force of 200 n directed up the slope. the coefficient of sliding friction is 0.18.

Two trains leave the same station at the same time. The first train travels north at 60 mph. The second train travels west at 45 mph. Find how fast the distance between the trains is changing two hours after the trains have left.

If the room radius is 4.5 m, and the rotation frequency is 0.8 revolutions per second when the floor drops out, what is the minimum coefficient of static friction so that the people will not slip down?

Energy of motion is known as what energy

While a constant total force of 17 n is exerted on a cart, the cart's acceleration is 5 m/s2. find the mass of the cart?