Which are principles of dynamics

A falling baseball has an acceleration of magnitude 2.1 m/s2. What is its acceleration in feet per second squared?

A curving freeway exit has a radius of 50 m and a posted speed limit of 35 mph. What is your radial acceleration if you take this exit at the posted speed? Use 1 mph = 0.447 m/s. 4.9 m/s2 6.3 m/s2 0.3 m/s2 2.5 m/s2

Which use of a simple machine changes the direction of a force? A. using a ramp to load boxes onto a truck B. using an axe to split wood C. removing a bottle cap with a bottle opener D. lifting a rock with a crowbar

Which material is likely to experience a nearly elastic collision?

What objects in the universe give out their own light?

Humpty Dumpty (12 kg) sat on a wall (2 m high). What was his potential energy, before his great fall? A. 235.2 J B. 235.2 N C. 24 J D. 246.1 W

Explain how we were able to boil water at room temperature

A car drives at 30km/h around a roundabout. I still the car accelerating?

It is well known that bullets and other missiles fired at Superman simply bounce off his chest. Suppose that a gangster sprays Superman's chest with 6.7 g bullets at the rate of 78 bullets/min, and the speed of each bullet is 530 m/s.

Seth starts from rest at the end of his driveway and accelerates down the road on a skateboard at 4 m/s squared 12 seconds what is the speed at the end of his 12 seconds