You want to build a grandfather clock with a pendulum (a weight on the end of a light cable) that has one second between its "tick" (swinging to) and its "tock" (swinging fro). (a) How long do you make the cable? Answer in m
You want to build a grandfather clock with a pendulum (a weight on the end of a light cable) that has one second between its "tick" (swinging to) and its "tock" (swinging fro). (a) How long do you make the cable? Answer in m
1 answer · Physics · 9 years ago
• ### Physics Problem Help Please!!!?

A block lies on a smooth plane tilted at an angle θ = 24.0° to the horizontal. Ignore friction. (a) Determine the acceleration of the block as it slides down the plane. Ans in m/s^2 (b) If the block starts from rest 9.20 m up the plane from its base, what will be the block's speed when it reaches the bottom of the incline? Ans in m/s.
A block lies on a smooth plane tilted at an angle θ = 24.0° to the horizontal. Ignore friction. (a) Determine the acceleration of the block as it slides down the plane. Ans in m/s^2 (b) If the block starts from rest 9.20 m up the plane from its base, what will be the block's speed when it reaches the bottom of the incline? Ans in m/s.
1 answer · Physics · 9 years ago

A child slides down a slide with a 28° incline, and at the bottom her speed is precisely two-thirds what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child. Ans has no unit.
A child slides down a slide with a 28° incline, and at the bottom her speed is precisely two-thirds what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child. Ans has no unit.
2 answers · Physics · 9 years ago

A 23.0 kg box is released on a 36.0° incline and accelerates down the incline at 0.273 m/s2. Find the friction force impeding its motion. Ans in N How large is the coefficient of friction? Ans in N
A 23.0 kg box is released on a 36.0° incline and accelerates down the incline at 0.273 m/s2. Find the friction force impeding its motion. Ans in N How large is the coefficient of friction? Ans in N
1 answer · Physics · 9 years ago

A block lies on a smooth plane tilted at an angle θ = 24.0° to the horizontal. Ignore friction. (a) Determine the acceleration of the block as it slides down the plane. Ans in m/s^2 (b) If the block starts from rest 9.20 m up the plane from its base, what will be the block's speed when it reaches the bottom of the incline? Ans in... show more
A block lies on a smooth plane tilted at an angle θ = 24.0° to the horizontal. Ignore friction. (a) Determine the acceleration of the block as it slides down the plane. Ans in m/s^2 (b) If the block starts from rest 9.20 m up the plane from its base, what will be the block's speed when it reaches the bottom of the incline? Ans in m/s. I have been on this for hours. Please help me out.
1 answer · Physics · 9 years ago

Give exact answers for 0 less than or equal to theta is less than or equal to pi/2 If cos theta= 1/2, what is sec theta? tan theta? If cos theta= 1/2, what is csc theta? cot theta? If sin theta = 1/3, what is sec theta? tan theta? How do I do these problems? Please show work. I have been on these problems for hours. Please Help. Thank You!
Give exact answers for 0 less than or equal to theta is less than or equal to pi/2 If cos theta= 1/2, what is sec theta? tan theta? If cos theta= 1/2, what is csc theta? cot theta? If sin theta = 1/3, what is sec theta? tan theta? How do I do these problems? Please show work. I have been on these problems for hours. Please Help. Thank You!
4 answers · Mathematics · 9 years ago

"The world's poorest countries cannot find anything to export. There is no resource that is abundant - certainly not capital nor land, and in small poor nations not even labor is abundant," Discuss.?
"The world's poorest countries cannot find anything to export. There is no resource that is abundant - certainly not capital nor land, and in small poor nations not even labor is abundant," Discuss.?
1 answer · Economics · 10 years ago

A 65kg swimmer jumps off of a high cliff to the water below. If the water exerts a force of 3185 N on the swimmer, and slows him down 2 m below the water, what was the swimmers velocity just before hitting the water? Please work it out so that I can see how to do it. Thank You I got an answer of 49, but that was just from F=ma. I already... show more
A 65kg swimmer jumps off of a high cliff to the water below. If the water exerts a force of 3185 N on the swimmer, and slows him down 2 m below the water, what was the swimmers velocity just before hitting the water? Please work it out so that I can see how to do it. Thank You I got an answer of 49, but that was just from F=ma. I already knew this, but I just didn't think it was right. The person who helped me with this said that 2m was not needed?
3 answers · Physics · 10 years ago
• ### Is it possible to find the slope of a line that is not straight?

3 answers · Mathematics · 10 years ago

A car is driven 170 km west and then 40 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)? So I get 174.64 km What is the ° south of west
A car is driven 170 km west and then 40 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)? So I get 174.64 km What is the ° south of west
1 answer · Physics · 10 years ago
• ### Physics Help Please. Im going crazy!!?

A football is kicked so that its initial speed is 23.1m/s. If the football reaches a maximum height of 16.9m, at what angle with respect to the ground is the ball kicked? Please show me how you got the answer. It's taking me so long to figure this out.
A football is kicked so that its initial speed is 23.1m/s. If the football reaches a maximum height of 16.9m, at what angle with respect to the ground is the ball kicked? Please show me how you got the answer. It's taking me so long to figure this out.
3 answers · Physics · 10 years ago
• ### Physics Help Please. I'm going crazy.?

A rocket, starting from rest, moves upward with an acceleration of 29.4m/s2. It travels for 4 seconds in the air at this acceleration. A. How far does the rocket travel during this time? B.After the 4 seconds, the rocket runs out of fuel, but continues to rise at an acceleration of -9.8m/s2 until it comes to a stop. Find how far the rocket... show more
A rocket, starting from rest, moves upward with an acceleration of 29.4m/s2. It travels for 4 seconds in the air at this acceleration. A. How far does the rocket travel during this time? B.After the 4 seconds, the rocket runs out of fuel, but continues to rise at an acceleration of -9.8m/s2 until it comes to a stop. Find how far the rocket is from the ground when it stops. Please help me with this. I've been working on this for an hour. Also show work please, so that i can finally understand how to get the answers. Thank You
2 answers · Physics · 10 years ago
• ### Physics. I'm really lost.?

A person driving her car at 54 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 s before turning to red, and she is 30 m away from the near side of the intersection (Fig. 2-29). Should she try to stop, or should she make a run for it? The intersection is 15 m wide. Her car's... show more
A person driving her car at 54 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 s before turning to red, and she is 30 m away from the near side of the intersection (Fig. 2-29). Should she try to stop, or should she make a run for it? The intersection is 15 m wide. Her car's maximum deceleration is -6.6 m/s2, whereas it can accelerate from 54 km/h to 70 km/h in 4.8 s. Ignore the length of her car and her reaction time. If she hits the brakes, how far will she travel before stopping? This answer is 16.8m If she hits the gas instead, how far will she travel before the light turns red? Whats this one? Answer in m.
3 answers · Physics · 10 years ago

A person driving her car at 54 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 s before turning to red, and she is 30 m away from the near side of the intersection (Fig. 2-29). Should she try to stop, or should she make a run for it? The intersection is 15 m wide. Her car's... show more
A person driving her car at 54 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 s before turning to red, and she is 30 m away from the near side of the intersection (Fig. 2-29). Should she try to stop, or should she make a run for it? The intersection is 15 m wide. Her car's maximum deceleration is -6.6 m/s2, whereas it can accelerate from 54 km/h to 70 km/h in 4.8 s. Ignore the length of her car and her reaction time. If she hits the brakes, how far will she travel before stopping? This answer is 16.8m If she hits the gas instead, how far will she travel before the light turns red? Whats this one? Answer in m.
1 answer · Physics · 10 years ago
• ### Physics help please!!! I really need help with this problem.?

An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at +13.0 m/s2. At t1 the rocket engine is shut down and the sled moves with constant velocity v until t2. The total distance traveled by the sled is 5.30 x 10^3 m and the total time is 87.0 s. Find tl. Answer in s Find t2. Answer in s Find... show more
An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at +13.0 m/s2. At t1 the rocket engine is shut down and the sled moves with constant velocity v until t2. The total distance traveled by the sled is 5.30 x 10^3 m and the total time is 87.0 s. Find tl. Answer in s Find t2. Answer in s Find v. Answer m/s
2 answers · Physics · 10 years ago