Asked by Sue
Please show me how to work the following problems.
1) A cyclist whose mass is 48 kg turns a corner with a radius of 30 m at a speed of 25 m/s.
A) What is the magnitude of the cyclist's acceleration?
B) What is the magnitude of the net force acting on the cyclist?
2) A rock is thrown off a tall cliff with a vertical speed of 53 m/s upward and a horizontal speed of 30 m/s.
A) What will these speeds Vx and Xy, be 4 second later?
B) What is the x and y displacements of the rock be 4 seconds later?
3) A bowling ball rolls off the edge of a giant' table at 18 m/s. If it takes 6 s for the ball to hit the ground.
A) How far does it fall?
1) A cyclist whose mass is 48 kg turns a corner with a radius of 30 m at a speed of 25 m/s.
A) What is the magnitude of the cyclist's acceleration?
B) What is the magnitude of the net force acting on the cyclist?
2) A rock is thrown off a tall cliff with a vertical speed of 53 m/s upward and a horizontal speed of 30 m/s.
A) What will these speeds Vx and Xy, be 4 second later?
B) What is the x and y displacements of the rock be 4 seconds later?
3) A bowling ball rolls off the edge of a giant' table at 18 m/s. If it takes 6 s for the ball to hit the ground.
A) How far does it fall?
Answers
Answered by
Henry
Given: Vx = 30 m/s., Vy = 53 m/s.
2A. Vx = 30 m/s.
Vy = 53 + g*t = 53 - 9.8*4 = 13.8 m/s.
2B. Dx = Vx*t = 30 * 4 = 120 m.
Dy = 13.8 * 4 = 55.2 m.
3A. h = 0.5g*t^2 = 4.9*6^2 = 176.4 m.
2A. Vx = 30 m/s.
Vy = 53 + g*t = 53 - 9.8*4 = 13.8 m/s.
2B. Dx = Vx*t = 30 * 4 = 120 m.
Dy = 13.8 * 4 = 55.2 m.
3A. h = 0.5g*t^2 = 4.9*6^2 = 176.4 m.
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