An adventurous archeologist (m = 80.5 kg) tries to cross a river by swinging from a vine. the vine is 11.0 m long, and his speed at the bottom of the swing is 7.80 m/s. the archeologist doesn't know that the vine has a breaking strength of 1,000 n. does he make it safely across the river without falling in?

1400 kg car has a speed of 27 m/s. if it takes 7 s to stop the car, what is the impulse and the average force acting on the car?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.