2. What's the net force on a 2 kg mass spinning in a circle with a 1.50 m radius at a frequency of 4 Hz? 3. A car traveling at a speed of 30 m/s rounds a flat curve whose radius is 185 m. Find the coefficient of friction between the tires and the road?

Sam (75 kg) takes off (from rest) up a 50-m-high, 10° frictionless slope on his jet-powered skis. The skis have a thrust of 200 N. The thrust is turned off at the end of the ramp. How far does Sam land from the base of the cliff? Start 10⁰ 50 m 10⁰

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You want the final speed at the bottom of your roller coaster hill to be 25 m/s. What is the height (h) of the hill to achieve this?  Use g = 9.8 m/s2

46.

In the figure, four identical point charges q are placed at the four corners of the square whose sides a = 5 cm. What is the magnitude and direction of the resultant force on the charge in the upper-right corner of the square? The magnitude of the charge is 6uC. Show the FBD.

A 3kg ball is thrown straight into the air at 8m/s. How high does it travel? Use g=9.8m/s2

Q4. (a) Is a car going around a curve at 50 km/hr experiencing acceleration? Explain why or why not. (b) Is a skateboard coasting down a hill at 2 m/s experiencing acceleration? Explain why or why (c) Is a car stopping at an intersection experiencing acceleration? Explain why or why not. No, is decelerating because it is stopping, the car is going in a low speed low acceleration Q8. A motorcycle starts from a standstill. In 15 seconds it reaches a velocity of 20 m/s. What is the motorcycle's average acceleration? Q11. Polar bears are strong swimmers and can swim as long as 10 hours without rest. If a polar bear swims with an average speed of 2.6 m/s, what is the total distance it can swim in 10.0 hours? Give your answer in km.The total distance it can swim in 10 hours is 26km. Q12. How long does it take a baseball to travel the 18.4 m from the pitcher's mound to home plate when thrown at a speed of 34.5 m/s? Q16. A motorcycle starts with velocity of 10 m/s then accelerates for 40 m/s2…

6. Two blocks are connected by a light string passing over a light, frictionless pulley as shown in the figure. Block m1, initially at rest, is released from height h above the table. Block m,, which is the heavier block, begins to fall, while block m2 rises. a) Calculate the speed of m2 just as m¡ hits the table. b) Suppose block m, continues to rise without obstruction even after block m, hits the table. Calculate the maximum height above the table to which m2 rises. h

A cup is pushed off a 1.82 m tall shelf with a velocity of 1.82 m/s. How far from the shelf will the cup hit the ground?