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Rahul Kumar verified

Numerade educator

A space shuttle takes off from Earth, travelling straight upwards. The shuttle’s mass is 2 million kg, and its average power is 12.75 billion Watts. After 2 minutes, it is at an altitude of 50 km above the Earth’s surface. What was its average acceleration over the entire time period? Give your answer to 1 decimal place.

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Ivan Kochetkov verified

Numerade educator

A pendulum consists of a metal sphere hanging from a long string of negligible mass. The sphere is pulled to the side so that it is 0.81 m vertically above its lowest position. It is then released. How fast will it be moving (in m/s) when it passes through the lowest point along its path? You may ignore the effects of air resistance. Give your answer to 2 decimal places.

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Hubert Agamasu verified

Numerade educator

A space shuttle takes off from Earth, travelling straight upwards. The shuttle’s mass is 2 million kg, and its average power is 12.75 billion Watts. After 2 minutes, it is at an altitude of 50 km above the Earth’s surface. What was its average acceleration over the entire time period? Give your answer to 1 decimal place.

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Stephen Zaffke verified

Numerade educator

A space shuttle takes off from Earth, travelling straight upwards. The shuttle’s mass is 2 million kg, and its average power is 12.75 billion Watts. After 2 minutes, it is at an altitude of 50 km above the Earth’s surface. What was its average acceleration over the entire time period? Give your answer to 1 decimal place.

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Khoobchandra Agrawal verified

Numerade educator

A 600 g basketball is released at a height of 3.0 m and bounces off of the ground. In the collision between ball and ground, 5.0 J of energy is lost to heat. How high does the ball go up after the bounce in metres? Express your answer to 1 decimal place.

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Khoobchandra Agrawal verified

Numerade educator

A monkey swings on a rope of length 4.3 m. At the lowest point of the arc of the swing (when the monkey is the closest to the ground), what is the monkey’s speed in the vertical direction? Give your answer to 1 decimal place.

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Khoobchandra Agrawal verified

Numerade educator

The horn of a car sounds at a frequency of 492 Hz. The car travels at a constant speed towards a stationary observer with the horn playing. The observer hears a frequency of 557 Hz. The speed of sound in air is 343 m/s. Calculate the speed of the car in m/s. Give your answer to 1 decimal place.

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Khoobchandra Agrawal verified

Numerade educator

The graph shows how the displacement y of a particle in a wave varies with time. The wavelength of the wave is 16.7 m. What is the speed of the wave in m/s? Give your answer to 1 decimal place.

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Khoobchandra Agrawal verified

Numerade educator

A cyclist is capable of generating an average power of 2.3 kW during a 1.9 km speed trial. The average total resistive forces acting on her are 149 N. What was the time (in seconds) that she achieved in the speed trial? Give your answer to zero decimal places.

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Supratim Pal verified

Numerade educator

An object on an inclined plane of weight W = 19.5 kN is acted on by a force of 8.6 kN parallel to an inclined plane. The object travels up the slope at a constant speed and travels over a distance s = 39 m, also gaining h = 14.9 m in height. How much work is done against friction (i.e. energy dissipated as heat)? Give your answer in kilo-joules (kJ) Give your answer to zero decimal places.

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