The coefficient of static friction between the 200-kg crate and the flat bed of the truck is 0.35. (Eigure 1) Part A Determine the shortest time for the truck to reach a speed of 59 km/h, starting from rest with constant acceleration, so that the crate does not slip. Express your answer to three significant figures and include the appropriate units. HA igure < 1 of 1 t%3D Value Units Submit Request Answer Provide Feedback

Create a table of observation with the following hearing mu, Ff, FN, Fapp, Fg and Mass As well as plot a force of friction vs normal force graph and draw a line of best fit and calculate the slope of this line Ff= 1.1N Fn= -9.8 xm Fg= 9.8 xm

Box-Dog (who has a mass m) is going down a frictionless hill at a constant speed. Select all of the following equations that correctly describe Box-Dog’s motion. More than one answer may be possible; select allthat apply.A. Fdog + mgcos(theta) - Ft cos(phi) = 0B. Fdog + mgsin(theta) - Ft sin(phi) = 0C. Fdog + mgsin(theta) - Ft cos(phi) = 0D. FN + Ft cos(phi) - mgcos(theta)  = 0E. FN + Ft sin(phi) - mgcos(theta)  = 0F. FN + Ft sin(phi) - mgsin(theta)  = 0

Describe how a car moving at a constant speed can still be accelerating. Use the definitions of terms from the lesson in your answer.

The μ between Jimmy’s hand and his tennis racket is 0.25. a) How hard must he squeeze the racket if he wants to exert a force of 150N along the longitudinal axis of the racket? b) What do we know? c) What variable are we looking for? d) How hard must he squeeze the racket? Answer parts a-d. please show all work.

A student wants to learn about falling objects, so she drops a hammer, paper ball and marble from three different heights. She records the drop time and final speed for each trial as shown on the diagram and the mass (in grams) of each object is shown. Notes Answers have 5% tolerance to allow for estimation. Note that you have multiple attempts for each answer, so we recommend checking answers one at a time. We also recommend Desmos' graphing application to create graphs when necessary! Hammer Paper Ball Marble (mass: 3565g) (mass: 93g) (mass: 68g) 30m 60m 90m 30m 60m 90m 30m 60m 90m 2.475 3.50s 4.28s 5.83s 10.35 14.8s 2.47s 3.50s 4.285 24.2m/s 34.3m/s 42.0m/s 6.68m/s 6.68m/s 6.68m/s 24.2m/s 34.3m/s 42.0m/s 1. True or False: If two objects are dropped from the same height, the more massive object will always fall faster.

Q1) What is surface tension? What are the units of surface tension? From the figure, explain how surface tension relates to the force Fneeded to hold the movable side, and the length of the immovable side L. d.x