Mechanics Random Retrieval

You're down the allotment and are carrying your 65 kg Nana in a 20kg wheelbarrow. Your Nana's and the wheelbarrow's weight acts 60 mm from the centre of the wheel. What force do you need to apply to the end of the handle, 1.2 m from the centre of the wheel, to move your Nana about? g = 9.81 ms^-2

A bungee jumper of mass 74 kg, falls 68.5 m before the bungee cord begins to stretch. Calculate the gravitational potential energy lost by the bungee jumper in falling 68.5 m. g = 9.81 Nkg^-1.

Trolley jousting. A Lidl Trolley T_L of mass 21.0 kg, collides on a horizontal frictionless surface with an Aldi Trolley, T_A of mass 22.5 kg. Before the collision T_L was moving at 3.0 ms^-1 and T_A was at rest. They get stuck together, calculate their velocity.

Which of the following quantities has the same unit as the rate of change of momentum?

These graphs show the acceleration of 4 Y9 100 m sprinters. Select the graph which shows student with the greatest acceleration.

An ill prepared student asks for a pen to write with in class, and the teacher grudgingly lends one out. Instead of walking over to the student, the teacher decides to throw them the pen. The teacher throws the pen at angle of 14° and a speed of 23 ms^-1. Sadly, the teacher misses and the pen continues on it's projected path out the window and takes 5 seconds to hit the car park outside.

Calculate the height different between the point of release and the car park floor. g_Earth = 9.81 ms^-2

A climber falls from a rock face and accelerates due to gravity for 3 seconds before his rope stops his fall. What distance did he fall?

A rugby player accelerates steadily from rest at 1.82 ms^-2 for 4 seconds. Calculate their final speed.

Which is the correct definition for acceleration?

Select if the following is a scalar or a vector: mass