Block 1 (2 kg) is on the surface of a frictionless inclined plane that makes an angle of 35 degrees with the horizontal. Assume g = 10 m/s2. What is the magnitude of the acceleration of block 1 down the incline plane? m/s2   How far does block 1 travel down the plane in 2 s after it is released?

A car travels around a horizontal bend of radius 110 m at a constant speed. If the coefficient of the static friction between the road and car tyres is us = 7.4, What is the magnitude of car's acceleration (m/s²) when the car is negotiating ?the bend at the maximum allowed speed

A hockey puck (mass = 3 kg) leaves the players stick with a speed of 20 m/s and slides on the ice for 80 meters before coming to rest.a) What is the magnitude of the acceleration on the puck?  m/s2 b) What is the magnitude of the friction force exerted on the puck due to the ice? N c) What is the normal force on the puck? N d) What is the friction coefficient between the puck and the ice?  (unitless)

A 70 kg man drops to a concrete patio from a window only 0.55 m above the patio. He neglects to bend his knees on landing, taking 2.0 cm to stop. (a) What is his average acceleration from when his feet first touch the patio to when he stops? m/s2 (b) What is the magnitude of the average stopping force? kN

m A person is pushing a wooden crate of mass mo = 20 kg at a constant speed vo = 1.2– for Ax = 3 m along a rough horizontal floor that has a coefficient of friction µk = .4.

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Would the answer be "tangent to the curve in the forward direction?" thank you!

= m = 2 kg boxes move along a conveyer belt at v = 3 m/s. The coefficient of friction between the boxes and the belt is us 0.4. When the emergency shutoff for the conveyer is triggered, it is desirable for the boxes to not slip. Assuming the emergency shutoff decelerates the belt at a constant rate, and all the belts are horizontal, what is the shortest shutoff time to ensure that no boxes slip? t = S Part 2 of 2 What would the minimum shutoff time be if somewhere along the belt there was a downward slope of 20°? t = S

16. Running without friction is impossible. In fact, to maximize your acceleration, you need to maximize the static friction between your shoes and the floor. a) Explain why static friction is necessary for running or walking. requirement, employees' shoes must have a coefficient of static friction of 0.5 or more on a specified tile surface. In an emergency, what is the minimum time interval in which a postal worker starting from rest can move a distance of 3 m on the tile surface? c) A typical athletic shoe has a coefficient of static friction of 0.8 when used on a running track. What is the minimum time interval in which an athlete starting from rest can move a distance of 100 m on a running track? b) To meet a U.S. Postal Service

Consider a skier heading down a 11° slope. Assume the coefficient of friction for waxed wood on wet snow is μk = 0.10 and use a coordinate system in which down the slope is positive. a. Calcuate the magnitude of the acceleration of the skier in m/s2 b. Find the angle, in degrees, of the slope on which this skier could move down the slope at constant velocity