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A 0.42 kg soccer ball moving at 12 m/s is kicked with a force of 126 N for 0.02 seconds. (a) calculate the impulse on the ball. (b) calculate the change in momentum on your foot. (c) what is the final velocity ofthe ball
A wheel of mass 50kg has a radius of 0.4m. It is making 480rpm. What a the torque necessary to bring it to rest in 40 seconds.
When a ball is released freely, it falls to the ground at 25 degrees. What is the horizontal scale and maximum height of the ball?This question concerns the measurement of viscosity of a liquid using the falling ball method.
a) Using a graduated syringe I found that 20 droplets was 0.89 ml
(don’t forget that one ml is equivalent to 1 cm3). Calculate the radius of one drop, expressing your answer in m. (3 marks)
b) I found that 50 ml of the oil I used had a mass of 46.34 g. Calculate the density of the oil in kg m-3. (2 marks)
A novice hunter’s shoulder becomes very sore after firing his hunting rifle all day. Clearly explain the physics behind this observation.
A construction worker gives a wheelbarrow a greater acceleration when it is empty compared to when it is full of concrete. Clearly explain the physics behind this observation.
It hurts when you stub your toe on a table leg. Clearly explain the physics behind this observation.
A canoe is not tied securely to the roof of a moving van. The van is involved in a collision. What happens to the canoe? Clearly explain the physics behind your prediction.
A child, sitting on a blanket, falls backward when the blanket is given a sharp tug. Clearly explain the physics behind this observation.
A hockey player slams into the boards and is brought to rest. Clearly explain the physics behind this observation.
