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After the collision the skip is moving west with a velocity of −14.4 m s−1.
What is the velocity of the car after the collision? (in m s−1 to 2 s.f)
Thank-you!
A 32.0 kg child descends a slide 4.00 m high. She reaches the bottom with a speed of 2.40 m/s. Was the mechanical energy conserved? Explain your reasoning and identify the energy transformations involved.
Thank-you!
You and a colleague are on a spacewalk, repairing your spacecraft that has stalled in deep space. Your 90.0 kn colleague, initially at rest, asks you to throw her a hammer, which has a mass of 3.0 kg. You throw it to her with a velocity of 4.5 m/s [forward].
a) What is her velocity after catching the hammer?
b) What impulse does the hammer exert on her?
c) What percentage of kinetic energy is lost in the collision?
A 48.0 kg in-line skater begins with a speed of 2.2 m/s. Friction also does (-150) J of work on her. Assume that se did not push on the ground any more. If her final speed is 5.9 m/s,
a) determine the change (final-initial) in her gravitational potential energy.
b) By how much, and in which direction (up or down), has her weight changed?
Please answer using grade 11 Conservation of Energy and Momentum .
A spring with a spring constant of 950 N/m is compressed 0.20 m. What speed can it give to a 1.5 kg ball when it is released?
Please answer using grade 11 Conservation of Energy and Momentum please!
A spring with a spring constant of 950 N/m is compressed 0.20 m. What speed can it give to a 1.5 kg ball when it is released?
Please answer using grade 11 Conservation of Energy and Momentum please!
A simple pendulum swings freely and rises at the end of its swing to a position 8.5 cm above its lowest point. What is its speed at its lowest point?
Answer using Grade 11 Conservation of Energy and Momentum please!
V1 = 0 m/s
height of the starting point (where V1 = 0) = 70m
height of the loop = 30m
V2 = ?
1. nm/min to μm/h
2. g/cn³ to kg/m³
