Podcast
Questions and Answers
A cart descends down a roller coaster and through a loop (the top of the loop is 30 m above ground level) with a velocity of 30 m/s. From what height did the cart initially descend?
A cart descends down a roller coaster and through a loop (the top of the loop is 30 m above ground level) with a velocity of 30 m/s. From what height did the cart initially descend?
75.9 m
A 0.500 g raindrop falls from a height of 1.5 km. Assuming no friction, what would the velocity upon impact with the ground be?
A 0.500 g raindrop falls from a height of 1.5 km. Assuming no friction, what would the velocity upon impact with the ground be?
171.5 m/s
A 0.500 g raindrop falls from a height of 1.5 km. If it reaches terminal velocity at 5.20 m/s how much work was done by air resistance to slow down the raindrop?
A 0.500 g raindrop falls from a height of 1.5 km. If it reaches terminal velocity at 5.20 m/s how much work was done by air resistance to slow down the raindrop?
7.34 J
A puck hits the net and comes to a complete halt in 0.4 m. If the puck weighs 0.2 kg and the work done to stop the puck was 60 J, calculate the deceleration.
A puck hits the net and comes to a complete halt in 0.4 m. If the puck weighs 0.2 kg and the work done to stop the puck was 60 J, calculate the deceleration.
A puck hits the net and comes to a complete halt in 0.4 m. If the puck weighs 0.2 kg and the work done to stop the puck was 60 J, calculate the initial velocity of the puck.
A puck hits the net and comes to a complete halt in 0.4 m. If the puck weighs 0.2 kg and the work done to stop the puck was 60 J, calculate the initial velocity of the puck.
A pump that is moving water up a tower has a power rating of 400W. How long would it take if it is 87% efficient, and it is moving 90L of water up a height of 50m with a constant velocity?
A pump that is moving water up a tower has a power rating of 400W. How long would it take if it is 87% efficient, and it is moving 90L of water up a height of 50m with a constant velocity?
A spring has a K value (spring constant) of 2000 N/m. If it was compressed 0.10m and was used to shoot a 100g object straight up in the air, how high would it go?
A spring has a K value (spring constant) of 2000 N/m. If it was compressed 0.10m and was used to shoot a 100g object straight up in the air, how high would it go?
Flashcards
Kinetic Energy (Ek)
Kinetic Energy (Ek)
Energy due to motion.
Potential Energy (Ep)
Potential Energy (Ep)
Energy due to position or configuration.
Work Done
Work Done
The energy needed to stop the puck to a complete halt.
Power
Power
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Terminal Velocity
Terminal Velocity
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Study Notes
- Exam covers force, work, energy, and power.
- The exam is worth a total of 40 marks.
Roller Coaster Problem
- A cart descends a roller coaster, goes through a loop with the top at 30 m above ground level, and has a velocity of 30 m/s; task is to find the initial descent height.
Raindrop Problem
- A 0.500 g raindrop falls from 1.5 km.
- Determine impact velocity assuming no friction.
- Calculate the work done to slow it down if it reaches a terminal velocity of 5.20 m/s.
Puck Problem
- A 0.2 kg puck hits a net, stopping in 0.4 m after 60 J of work.
- Calculate the deceleration.
- Calculate the initial velocity.
Water Pump Problem
- A pump with 400W power rating moves water up a tower.
- Determine how long an 87% efficient pump takes to move 90L of water to a height of 50m at constant velocity.
Spring Problem
- A spring (k = 2000 N/m) is compressed by 0.10m.
- Find how high a 100g object shot straight up travels.
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