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P1: Quiz 3
P1: Quiz 3
1) What is the formula for calculating the amount of energy in an elastic object’s elastic potential energy store. Write the units for all of the values as well.
2) k in the elastic potential energy formula stands for spring constant.
a) If we had a spring that requires a large force to either extend or compress, would the spring have a low or high value for its spring constant (k)?
b) If we had a spring that requires a small force to either extend or compress, would the spring have a low or high value for its spring constant (k)?
3) A student stretches a spring 0.2 metres. The spring has a spring constant of 40 N/m. Work out the energy in the spring’s elastic potential energy store.
4) A spring is compressed by 30 cm. The spring has a spring constant of 42 N/m. Work out the energy in the spring’s elastic potential energy store.
5) A student stretches a spring a certain distance. The spring has a spring constant of 80 N/m and the spring has 0.9 joules in its elastic potential energy store. Find the distance that the spring is stretched. Give your answer in cm.
6) When a spring is stretched 28 cm, it has 5.88 J in its elastic potential energy store. Find the spring constant for the spring.
7) A spring has a spring constant of 65 N/m. The spring is compressed by a certain distance, which results in the spring having 0.15925 joules in its elastic potential energy store. Find the compression of the spring. Give your answer in cm.
8) When a spring is compressed by 26 cm, it has 10.816 joules in its elastic potential energy stores. Find the spring constant for the spring.
9) What is the formula for working out the kinetic energy of an object? You do not need to give the units for the values in the formula.
The next two questions require you to use both the kinetic energy store formula and the elastic potential energy store formula.
10) A student uses a spring to fire a ball that has a mass of 20 grams into the air. The spring that she uses has a spring constant of 80 N/m and the student compresses the spring by 0.1 metres. Assume that all of the energy from the spring is transferred to the ball.
a) Work out the amount of energy in the spring’s elastic potential energy store.
b) As soon as the ball is fired, how much energy will the ball have in its kinetic energy store?
c) Find the velocity of the ball immediately after it is fired from the spring. Give your answer to 2 significant figures.
11) A child compresses a spring by 8 cm to launch a ball that has a mass of 25 grams into the air. When the spring is released, the ball is launched with a velocity of 9.2 m/s. Find the spring constant of the spring. Give your answer to 2 significant figures. Assume that all of the energy from the spring is transferred to the ball.
2) k in the elastic potential energy formula stands for spring constant.
a) If we had a spring that requires a large force to either extend or compress, would the spring have a low or high value for its spring constant (k)?
b) If we had a spring that requires a small force to either extend or compress, would the spring have a low or high value for its spring constant (k)?
3) A student stretches a spring 0.2 metres. The spring has a spring constant of 40 N/m. Work out the energy in the spring’s elastic potential energy store.
4) A spring is compressed by 30 cm. The spring has a spring constant of 42 N/m. Work out the energy in the spring’s elastic potential energy store.
5) A student stretches a spring a certain distance. The spring has a spring constant of 80 N/m and the spring has 0.9 joules in its elastic potential energy store. Find the distance that the spring is stretched. Give your answer in cm.
6) When a spring is stretched 28 cm, it has 5.88 J in its elastic potential energy store. Find the spring constant for the spring.
7) A spring has a spring constant of 65 N/m. The spring is compressed by a certain distance, which results in the spring having 0.15925 joules in its elastic potential energy store. Find the compression of the spring. Give your answer in cm.
8) When a spring is compressed by 26 cm, it has 10.816 joules in its elastic potential energy stores. Find the spring constant for the spring.
9) What is the formula for working out the kinetic energy of an object? You do not need to give the units for the values in the formula.
The next two questions require you to use both the kinetic energy store formula and the elastic potential energy store formula.
10) A student uses a spring to fire a ball that has a mass of 20 grams into the air. The spring that she uses has a spring constant of 80 N/m and the student compresses the spring by 0.1 metres. Assume that all of the energy from the spring is transferred to the ball.
a) Work out the amount of energy in the spring’s elastic potential energy store.
b) As soon as the ball is fired, how much energy will the ball have in its kinetic energy store?
c) Find the velocity of the ball immediately after it is fired from the spring. Give your answer to 2 significant figures.
11) A child compresses a spring by 8 cm to launch a ball that has a mass of 25 grams into the air. When the spring is released, the ball is launched with a velocity of 9.2 m/s. Find the spring constant of the spring. Give your answer to 2 significant figures. Assume that all of the energy from the spring is transferred to the ball.